Down the Rails

{
  "game": {
    "name": "Down the Rails",
    "provider": "Pragmatic Play",
    "theme": "London underground / Victorian railway caricature. The setting is a dark, moody London tube station at night — stone archways, platform signage, vintage train carriages visible in the background. Characters are grotesque caricatures of historical British figures (Henry VIII style, Shakespearean playwright, a plump society lady, etc.), rendered in warm earthy tones with ornate portrait-card frames. The BONUS symbol is a green London Underground train carriage.",
    "documentation_purpose": "Exhaustive accessibility documentation (blind/low-vision screen-reader users, deaf/hard-of-hearing, color-blind of all types, motor-impaired) from 27 desktop screenshots (1280x800) + OCR ground truth + zoomed crops.",
    "method_notes": "Visual details verified with zoomed crops (paytable symbols, payline diagram, Feature Gamble hierarchy, Buckingham Palace FS, Big Smoke colossal, Wild Strips). All payout numbers confirmed from paytable zoom. RTP/bet limits confirmed by OCR of rules_p7.png. Gamble probability text confirmed by zoom crop of feature_gamble_collect_or_gamble.png. HUGE WIN amount corrected to $93.60 by zoom (OCR of source had $98.60 — a visual OCR error on the stylized font; zoom confirms $93.60).",
    "language": "English"
  },

  "color_palette": {
    "overall": "Dark, atmospheric Victorian-London palette: deep charcoal and slate backgrounds with warm amber/gold framing. The overall impression is shadowy and theatrical.",
    "background_base_game": "Very dark charcoal gray/near-black representing an underground station tunnel. Warm purple-brown stone archway surround visible at edges. On the far left and right outside the reels: a blurred station platform with Victorian-era passengers in dark silhouette, and a green London Underground train visible in the deep background.",
    "reel_frame": "Ornate gold and brass Victorian metalwork border around the 5-reel grid. Decorative cogwheel and gear elements in the corners. Warm amber glow to the metalwork, dark maroon/brown interior cell dividers.",
    "reel_cells": "Medium brown/mahogany wood-panel appearance for individual cells, separated by thin gold lines.",
    "title_banner": "The game logo 'DOWN THE RAILS' sits above the reels: large gold serif letters with a dark blue-grey drop shadow, framed in an ornate gold Victorian railway signboard shape with decorative scrollwork on each end.",
    "bottom_bar": "Semi-transparent very dark charcoal overlay across the bottom of the screen. Yellow/gold text for CREDIT and BET labels. White text for balance values. Large circular dark-grey spin button with white arrow icon center-right.",
    "feature_gamble_screen": "Dark teal/navy background filling most of the screen. A large ornate gold frame with gear motifs houses the feature selection. The hierarchy panel on the right uses wood-brown framing with gold borders. Active/selected feature has a bright green-teal animated glow.",
    "bonus_trigger_highlight": "Bright acid-green glow outline around BONUS symbols on the reels when triggered. Green frame around the three reels where BONUS symbols land.",
    "free_spins_buckingham_palace": "Background shifts to a warm cream/stone white and sky blue — an illustration of Buckingham Palace's neoclassical facade fills the entire background behind the reels. The feature indicator badge 'BUCKINGHAM' appears top-right in a teal/green badge.",
    "win_screen_coins": "Dark navy/cobalt blue background with a bright blue tunnel-light glow in the center. Gold coins rain down across the entire screen. A stylized green-silver London tube train flies through the center of the coin shower.",
    "congratulations_screen": "Dark wood-brown background with a centered message box in lighter brown/cream. 'CONGRATULATIONS!' text in large bright gold 3D letters with dark shadow.",
    "huge_win_overlay": "Bright electric blue full-screen radial flash (deep blue to near-white center). Gold 3D letters 'HUGE WIN!' with orange outline. Amount shown on a teal/dark-blue horizontal plaque with gold filigree border.",
    "accent_colors": "Gold (most headings, borders, key labels), green (COLLECT button, active feature badge, BONUS symbol label, some royals), teal/cyan (BUCKINGHAM badge, WIN plaque), red (GAMBLE button, GAMBLE label), purple-magenta (Q royal letter), blue (K royal letter), green (J royal letter).",
    "colorblind_notes": "COLLECT button (green) vs GAMBLE button (red) distinction — shape and text label also differentiate: COLLECT has a leftward shape, GAMBLE has a rightward shape, and text is clearly printed inside each. Feature Gamble hierarchy uses text names (Pentonville, King's Cross, etc.) not color alone. Payline numbers shown on diagram with distinct cell-highlight patterns, not only color. WIN amounts always shown as explicit dollar text."
  },

  "symbols": {
    "note": "All payouts read from zoomed paytable crops (paytable_p1.png, zoom x4). Payouts are in USD at demo default bet of $2.00 per spin. Paylines = 20. Wins are left-to-right on adjacent reels from reel 1.",
    "character_symbols": [
      {
        "rank": 1,
        "name": "Henry VIII style king (portly bearded man in Tudor crown and ermine-trimmed robes)",
        "appearance": "Full-face caricature portrait of a very stout, ruddy-faced man with a long forked red-brown beard, wearing a jeweled crown and white fur-trimmed robes. Framed in an ornate gilded portrait frame with dark red background. The character holds a small object (ring or jewel) near his chin.",
        "payouts": {"5_of_a_kind": "$50.00", "4_of_a_kind": "$10.00", "3_of_a_kind": "$4.00"},
        "source": "paytable_p1.png, zoom crop _payouts_row1.png"
      },
      {
        "rank": 2,
        "name": "Portly fat man in suit (politician / upper-class caricature)",
        "appearance": "Round-faced very obese man with a shiny bald head, wearing a dark suit and a red carnation. Holds a cigar. Face is rosy and self-satisfied, large jowls. Background is blue-grey. Framed in an ornate grey/silver card frame.",
        "payouts": {"5_of_a_kind": "$25.00", "4_of_a_kind": "$8.00", "3_of_a_kind": "$2.00"},
        "source": "paytable_p1.png, zoom crop _sym2_char.png"
      },
      {
        "rank": 3,
        "name": "Shakespearean playwright (thin-faced man with beard and moustache, period ruff collar)",
        "appearance": "Lean, long-faced man with a wispy pointed beard and thin moustache, wearing a white lace ruff collar and dark period clothing. Expression is dour and aristocratic. Framed in a silver/dark ornamental frame, darker background.",
        "payouts": {"5_of_a_kind": "$25.00", "4_of_a_kind": "$8.00", "3_of_a_kind": "$2.00"},
        "source": "paytable_p1.png, zoom crop _right_symbols.png"
      },
      {
        "rank": 4,
        "name": "Lady in bonnet (Victorian society woman with white bonnet/cap)",
        "appearance": "A plump, pleasant-faced Victorian woman wearing a white frilled bonnet and a period dress with a light purple/lavender shawl. She holds a small object (possibly a candle or cake). Warm pinkish tones. Framed in an ornate pinkish-gold frame.",
        "payouts": {"5_of_a_kind": "$20.00", "4_of_a_kind": "$6.00", "3_of_a_kind": "$1.00"},
        "source": "paytable_p1.png, zoom crop _right_symbols.png"
      },
      {
        "rank": 5,
        "name": "Witch / sorceress (dark-haired woman with long crooked nose, holding an apple)",
        "appearance": "A pale, thin-faced woman with long dark curly hair, a pronounced crooked nose, and a sly half-smile. She holds a shiny red apple in one hand. Background is dark teal/moonlit blue. Framed in a dark violet/purple ornamental frame.",
        "payouts": {"5_of_a_kind": "$20.00", "4_of_a_kind": "$6.00", "3_of_a_kind": "$1.00"},
        "source": "paytable_p1.png, zoom crop _right_symbols.png"
      }
    ],
    "royal_symbols": [
      {
        "name": "A",
        "color": "dark red / crimson",
        "style": "Large ornate serif capital letter in metallic dark red with gold highlights, set on an embossed circular coin-like background",
        "payouts": {"5_of_a_kind": "$10.00", "4_of_a_kind": "$4.00", "3_of_a_kind": "$0.80"},
        "source": "paytable_p1.png, zoom crop _bottom_symbols.png"
      },
      {
        "name": "K",
        "color": "blue / navy",
        "style": "Ornate serif capital K in metallic cobalt blue with gold crown decoration above the letter",
        "payouts": {"5_of_a_kind": "$8.00", "4_of_a_kind": "$2.00", "3_of_a_kind": "$0.60"},
        "source": "paytable_p1.png, zoom crop _bottom_symbols.png"
      },
      {
        "name": "Q",
        "color": "purple / magenta",
        "style": "Ornate serif capital Q in metallic purple-magenta with gold coin-style detailing and small circular gems",
        "payouts": {"5_of_a_kind": "$6.00", "4_of_a_kind": "$1.00", "3_of_a_kind": "$0.40"},
        "source": "paytable_p1.png, zoom crop _right_symbols.png"
      },
      {
        "name": "J",
        "color": "green / emerald",
        "style": "Ornate serif capital J in metallic emerald green with gold trim",
        "payouts": {"5_of_a_kind": "$5.00", "4_of_a_kind": "$1.00", "3_of_a_kind": "$0.40"},
        "source": "paytable_p1.png, zoom crop _right_symbols.png"
      }
    ],
    "wild": {
      "name": "WILD",
      "appearance": "A folded newspaper with the headline 'NEWS' in block letters across the top and the word 'WILD' in large gold letters below, set against an off-white newsprint background. A crumpled paper texture. The card frame is brown-gold newsprint style. This is distinctly shaped to avoid confusion — it is not a character portrait.",
      "rules": "Substitutes for all symbols except the BONUS symbol and feature-specific special symbols. Appears on all 5 reels.",
      "payout": "No direct payout listed in paytable; acts as substitute only.",
      "source": "paytable_p1.png text + bonus_trigger.png zoom + feature_wild_strips.png visual"
    },
    "bonus_scatter": {
      "name": "BONUS",
      "appearance": "A London Underground tube train carriage viewed from the front, rendered in dark green with silver/chrome trim and two bright circular headlights. The word 'BONUS' appears in large bright golden-orange letters below the carriage image. Background is a dark circular frame. Very distinctive, shaped like a real tube train front — unmistakable on the reels.",
      "rules": "Hit 3 or more BONUS symbols anywhere on the screen (any reels, any positions) to trigger the BONUS feature. Can also trigger the END OF THE LINE round directly.",
      "payout": "No direct cash payout; triggers the bonus feature.",
      "source": "paytable_p1.png text + bonus_trigger.png visual + _wild_bonus.png zoom"
    }
  },

  "technical_summary": {
    "rtp_percent": 96.51,
    "rtp_source": "rules_p7.png: 'The theoretical RTP of this game is 96.51%'",
    "volatility": "High — shown as FFFFF (5 of 5 filled blocks) next to the word VOLATILITY. Text: 'High volatility games pay out less often on average but the chance to hit big wins in a short time span is higher.'",
    "volatility_source": "rules_p7.png",
    "bet_min": "$0.20",
    "bet_max": "$100.00",
    "bet_source": "rules_p7.png: 'MINIMUM BET: $0.20  MAXIMUM BET: $100.00'",
    "demo_default_bet": "$2.00",
    "demo_credit": "$100,000.00",
    "reels": "5 reels, 4 rows (standard grid). Base game uses fixed 5x4 layout.",
    "paylines": "20 fixed paylines (not ways-to-win). Payline diagram shows patterns 1-20 as horizontal/diagonal zig-zag paths across the 5x4 grid.",
    "payline_source": "rules_p7.png payline diagram (20 numbered patterns visible), OCR and zoom confirmed",
    "win_direction": "Left to right, adjacent reels starting from the leftmost reel.",
    "win_rules": "All values expressed as actual wins in coins/cash. Only the highest win is paid per line. When winning on multiple paylines, all wins are added to the total win.",
    "respin_note": "Respin win is added to the payline win. Respin round win is awarded to the player after the round completes. Respin round total win in history contains the whole win of the cycle.",
    "max_win": "5,000x total bet (applies in base game AND any feature). If total win reaches 5,000x bet, any round immediately ends, win is awarded, and all remaining features are forfeited.",
    "max_win_source": "rules_p6.png: 'The maximum win amount is limited to 5,000x bet during the base game and any feature.' Also shown on preview.png splash: 'WIN UP TO 5,000X BET'.",
    "bonus_buy": "None. No Buy Feature or Buy Bonus button is present on any screen.",
    "keyboard_controls": "SPACE and ENTER buttons on the keyboard can be used to start and stop the spin.",
    "currency_view": "CREDIT and BET labels show total bet in coins and cash. Clicking on the labels can switch between COINS VIEW and COIN VALUE view.",
    "max_bet_rule": "Maximum win is capped at 5,000x bet round-end regardless of active round type."
  },

  "screens": {
    "preview_slide_1": {
      "type": "other (splash intro slide 1 of 2)",
      "file": "preview.png",
      "description": "Promotional splash/intro screen shown before the game loads. Left side shows the 5x4 reel grid with 5 character symbols and royals visible, plus BONUS and WILD symbols present. Right side features a large close-up portrait of the 'portly politician' character — the same obese man from reel symbol #2, but rendered large and imposing, wearing a dark suit with a white shirt and blue tie, looking smugly off to the right. He occupies roughly the right third of the splash.",
      "logo_position": "Top-center, ornate gold Victorian railway-sign style. Text: 'DOWN THE RAILS' in large gold serif letters with dark shadow.",
      "promo_text": "Bottom-center in large yellow/gold capital letters: 'WIN UP TO 5,000X BET'. White dot navigation indicators (3 dots, first active) below that.",
      "volatility_indicator": "Bottom-right corner: small text 'VOLATILITY' with 5 filled orange/yellow blocks (FFFFF, 5 of 5 = maximum high volatility).",
      "enter_button": "Bottom-right: white circular arrows icon (refresh/enter) in a dark circle — clicking enters the game.",
      "checkbox": "Bottom-right next to the enter button: 'DON'T SHOW NEXT TIME' checkbox (unchecked by default) in white text.",
      "background": "Dark maroon/deep red atmospheric background simulating a Victorian interior. The reel grid is faintly visible in the upper-left area.",
      "colorblind_notes": "Volatility rating and max win promo are conveyed by text — no color-only reliance. Enter button is an icon but positioned consistently (bottom-right corner) alongside the checkbox."
    },
    "preview_slide_2": {
      "type": "other (splash intro slide 2 of 2)",
      "file": "preview_p2.png",
      "description": "Second promotional splash slide showing all 5 bonus feature options in a grid layout. The same portly politician character is on the right side. Navigation dots show the second is active (second dot highlighted).",
      "feature_tiles": [
        {"name": "PENTONVILLE", "subtitle": "FREE SPINS", "visual_style": "dark crimson/brick red tile with the name in white text"},
        {"name": "KING'S CROSS", "subtitle": "FREE SPINS", "visual_style": "dark blue tile"},
        {"name": "BUCKINGHAM PALACE", "subtitle": "FREE SPINS", "visual_style": "cream/beige gold tile, prominent"},
        {"name": "CANARY WHARF", "subtitle": "FREE SPINS", "visual_style": "green tile"},
        {"name": "END OF THE LINE", "subtitle": "FREE SPINS", "visual_style": "dark teal/black tile with train imagery"}
      ],
      "headline": "Bottom-center: '5 EPIC FREE SPINS STATIONS!' in large gold/yellow letters.",
      "layout": "2x2 grid of the four main free-spins stations (Pentonville top-left, King's Cross top-right, Buckingham Palace bottom-left, Canary Wharf bottom-right) with End of the Line appearing as a fifth tile in a row below or separately.",
      "colorblind_notes": "Feature tiles each have their own text name — distinguishable by station name even without color differentiation."
    },
    "base_game": {
      "type": "base_game",
      "file": "base_game.png",
      "overall_layout": "Standard 5-reel x 4-row grid centered on the screen. Ornate gold Victorian brass/gear-work border frame around the reel grid. The entire grid is roughly centered horizontally and vertically within the 1280x800 viewport.",
      "title_banner": "Above the reels: 'DOWN THE RAILS' logo in large 3D gold letters with dark outline on a gold Victorian railway-sign shape, flanked by decorative scrollwork.",
      "background": "Dark charcoal gray tunnel behind the reels; Victorian station platform with dim lamps visible at far left and right edges; a green tube train visible in the deep background at left.",
      "reel_cells": "Mahogany/dark brown wood-panel texture per cell; thin gold dividers between cells.",
      "symbols_on_this_frame": "Random assortment (not a fixed property): includes K (blue), J (green), Q (purple), A (red), multiple character portraits (portly man, playwright). NOTE: per-spin symbol layout is random and not documented cell-by-cell.",
      "bottom_bar": {
        "far_left": "Round dark-circle MENU button (three horizontal lines / hamburger icon) — opens System Settings. Below it: round SOUND button (white speaker icon).",
        "info_button": "Round 'i' (information) button in a dark circle, slightly right of the menu/sound column — opens the 10-page Game Rules booklet.",
        "credit_bet_display": "Center-left area: 'CREDIT' label in small yellow text above '$100,000.00' in white, and 'BET' label in yellow above '$2.00' in white.",
        "center_hint": "Large white text in the center of the bottom bar: 'HOLD SPACE FOR TURBO SPIN'.",
        "spin_button": "Large circular dark-grey button with white circular-arrow icon (right side of center). This is the main SPIN button.",
        "bet_controls": "Small oval minus '−' button to the left of spin button; small oval plus '+' button to the right of spin button.",
        "autoplay": "Rounded rectangular 'AUTOPLAY' button with a small animated icon, below and right of the spin button.",
        "branding": "'PRAGMATIC PLAY' in small grey text at very bottom-left."
      },
      "accessibility_layout": "All interactive controls (menu, sound, info, bet −/+, spin, autoplay) are on the bottom bar. The reel grid is the primary visual area above. Controls are icon-based but consistent with Pragmatic Play standard layout."
    },
    "base_game_win": {
      "type": "base_game (win state)",
      "file": "base_game_win.png",
      "description": "Base game after a payline win. A green highlight/glow outline traces the winning payline across the matching symbol cells. Winning symbols appear enlarged or glowing.",
      "win_display": "Bottom bar shows 'WIN $1.00' in bright yellow/gold text (where the HOLD SPACE hint was). Below win, 'LINE 4 PAYS $1.00' in white smaller text on the left side.",
      "credit_shown": "CREDIT $99,999.00, BET $2.00",
      "note": "The winning line highlight color is bright green — duplicated by the text 'LINE 4 PAYS' so colorblind users have textual confirmation of which line won.",
      "colorblind_notes": "Win highlight is green but the win amount text ($1.00) and line text are always shown in text regardless of color."
    },
    "base_game_big_smoke": {
      "type": "base_game (Big Smoke random feature active)",
      "file": "base_game_big_smoke.png",
      "description": "The BIG SMOKE random modifier has placed a colossal 2x2 (or up to 3x3) symbol on the reels. Visible here is a giant 'K' (royal symbol) covering a large portion of reels 1-2. The K is rendered enormously — blue metallic with the crown design — and is surrounded by a bright gold glow.",
      "win_display": "WIN $42.60 shown at bottom. 'LINE 2 PAYS $0.60' below.",
      "credit_shown": "CREDIT $99,989.00, BET $2.00",
      "ocr_note": "Colossal K symbol visible, remaining reels show character symbols (playwright, witch/sorceress, lady in bonnet)."
    },
    "paytable_p1": {
      "type": "paytable (page 1 of 10)",
      "file": "paytable_p1.png",
      "header": "GAME RULES (top center, white text on dark panel). Page indicator 'Page 1/10' bottom-right.",
      "content_description": "Five character symbol portraits arranged in a row with payouts below each. Below them, two rows of royal symbols (A, K in left row; Q, J in right row) with payouts. In the lower section: BONUS symbol with description on the left, WILD symbol with description on the right.",
      "symbol_payout_table": {
        "note": "Payouts at $2.00 bet. Wins are actual cash values.",
        "character_1_henry_viii": {"5": "$50.00", "4": "$10.00", "3": "$4.00"},
        "character_2_portly_politician": {"5": "$25.00", "4": "$8.00", "3": "$2.00"},
        "character_3_playwright": {"5": "$25.00", "4": "$8.00", "3": "$2.00"},
        "character_4_lady_in_bonnet": {"5": "$20.00", "4": "$6.00", "3": "$1.00"},
        "character_5_witch_with_apple": {"5": "$20.00", "4": "$6.00", "3": "$1.00"},
        "A_red": {"5": "$10.00", "4": "$4.00", "3": "$0.80"},
        "K_blue": {"5": "$8.00", "4": "$2.00", "3": "$0.60"},
        "Q_purple": {"5": "$6.00", "4": "$1.00", "3": "$0.40"},
        "J_green": {"5": "$5.00", "4": "$1.00", "3": "$0.40"}
      },
      "wild_text": "This symbol is WILD and substitutes for all symbols except BONUS and feature specific special symbols. WILD symbol appears on all reels.",
      "bonus_text": "This is the BONUS symbol. Hit 3 or more BONUS symbols to trigger the BONUS feature.",
      "navigation": "Bottom of rules overlay: left arrow (previous page), X close button, right arrow (next page) — all green circular buttons.",
      "colorblind_notes": "Symbol identities are distinguishable by portrait subject, not just color. WILD text and BONUS text are printed inside the panel. Payouts are numeric text — no color-only encoding."
    },
    "rules_p2": {
      "type": "rules (page 2/10 — Random Spin Features)",
      "file": "rules_p2.png",
      "content": "Describes all 5 random base-game modifiers. See features section below for full detail.",
      "ocr_excerpt": "RANDOM SPIN FEATURES — In the base game, at any spin, one of the following features can be triggered randomly."
    },
    "rules_p3": {
      "type": "rules (page 3/10 — Bonus trigger, Feature Gamble, Pentonville)",
      "file": "rules_p3.png",
      "content": "Bonus trigger rules (3+ scatter), Feature Gamble mechanics, Pentonville Free Spins description."
    },
    "rules_p4": {
      "type": "rules (page 4/10 — King's Cross, Buckingham Palace, Canary Wharf)",
      "file": "rules_p4.png",
      "content": "King's Cross Free Spins (5 spins, cross-mark mechanic), Buckingham Palace Free Spins (8 spins, stacked WILD), Canary Wharf Free Spins (8 spins, COLLECT money values)."
    },
    "rules_p5": {
      "type": "rules (page 5/10 — End of the Line, Money symbols, Extra Life, Prize Boost)",
      "file": "rules_p5.png",
      "content": "End of the Line Hold & Respin feature complete rules including MONEY SYMBOLS value list, EXTRA LIFE mechanic, PRIZE BOOST mechanic."
    },
    "rules_p6": {
      "type": "rules (page 6/10 — EXPAND, MULTIPLIER, MAX WIN)",
      "file": "rules_p6.png",
      "content": "EXPAND symbol mechanic, MULTIPLIER symbol mechanic, MAX WIN cap of 5,000x bet."
    },
    "rules_p7": {
      "type": "rules (page 7/10 — Game Rules: volatility, paylines, RTP, bets)",
      "file": "rules_p7.png",
      "content": "Volatility (High/FFFFF), all-wins pay left-to-right selected paylines, payline diagram 1-20, RTP 96.51%, min bet $0.20, max bet $100.00, keyboard controls."
    },
    "rules_p8": {
      "type": "rules (page 8/10 — How to Play, Main Game Interface)",
      "file": "rules_p8.png",
      "content": "Bet +/- controls, SPIN button, SETTINGS menu opens via hamburger button, AMBIENT sound toggle, info button opens information screen, CREDIT/BET view toggle, AUTOPLAY button."
    },
    "rules_p9": {
      "type": "rules (page 9/10 — Settings Menu, Information Screen, Bet Menu)",
      "file": "rules_p9.png",
      "content": "SETTINGS MENU: INTRO SCREEN toggle, AMBIENT toggle, SOUND FX toggle, GAME HISTORY link. INFORMATION SCREEN: use arrows to scroll pages, X to close. BET MENU: shows number of paylines and current total bet in coins and cash. Maximum win cap up to 5000x bet reminder."
    },
    "rules_p10": {
      "type": "rules (page 10/10 — Autoplay)",
      "file": "rules_p10.png",
      "content": "AUTOPLAY: click buttons showing number of possible auto-spins to start. SKIP SCREENS option auto-skips feature introduction and end screens after a short period."
    },
    "settings": {
      "type": "settings",
      "file": "settings.png",
      "layout": "SYSTEM SETTINGS overlay panel, centered on screen, dark background. The game's logo remains visible above the panel.",
      "controls": [
        {"name": "GAME HISTORY", "type": "link/button", "description": "Opens game history — a small icon (notepad/clipboard) is visible to its right."},
        {"name": "TOTAL BET", "type": "value adjuster", "description": "Shows '$2.00' between a minus (−) and plus (+) button. Adjusts the total bet amount."},
        {"name": "BATTERY SAVER", "type": "toggle", "state_visible": "OFF (grey/dark square toggle)", "description": "Reduces animations to save battery life."},
        {"name": "AMBIENT MUSIC", "type": "toggle", "state_visible": "ON (green square toggle)", "description": "Turns ambient music on or off the game."},
        {"name": "SOUND FX", "type": "toggle", "state_visible": "ON (green square toggle)", "description": "Turns game sound effects on or off."},
        {"name": "INTRO SCREEN", "type": "toggle", "state_visible": "cannot confirm from OCR", "description": "Toggles the introductory splash screen before starting the game."}
      ],
      "close_button": "X in the top-right corner of the overlay.",
      "colorblind_notes": "Toggle states (on/off) are indicated by both color (green = on, grey = off) and position (filled vs empty). If color is not perceived, the position or label text still shows which toggles are active."
    },
    "autoplay": {
      "type": "autoplay",
      "file": "autoplay.png",
      "layout": "AUTOPLAY SETTINGS overlay panel centered on the game screen. Reel symbols partially visible behind the overlay on left and right edges.",
      "controls": [
        {"name": "TURBO SPIN", "type": "checkbox", "state_visible": "unchecked (empty square)", "description": "Enables turbo/fast spin mode."},
        {"name": "QUICK SPIN", "type": "checkbox", "state_visible": "unchecked (empty square)", "description": "Enables quick spin mode."},
        {"name": "SKIP SCREENS", "type": "checkbox", "state_visible": "checked (green checkmark)", "description": "Auto-skips feature introduction and end screens."}
      ],
      "number_of_autospins": "Slider or selector showing '100' — the current number of auto-spins set. A green slider indicator is visible.",
      "start_button": "Bright green rounded-rectangle 'START AUTOPLAY (100)' button at the bottom of the panel.",
      "colorblind_notes": "SKIP SCREENS checkbox is checked (green checkmark visible) vs the unchecked ones (empty squares). Shape distinguishes checked from unchecked regardless of green/grey color."
    },
    "bonus_trigger": {
      "type": "bonus (BONUS trigger moment)",
      "file": "bonus_trigger.png",
      "description": "Three BONUS symbols (green tube train carriages) have landed on the reels, triggering the BONUS feature. Each BONUS symbol cell is highlighted with a bright acid-green glow border. The three BONUS symbols are on reels 1 (row 3), 3 (row 1), and 5 (row 2) — confirming scatter-style: any position, any three reels.",
      "other_visible_symbols": "J (green), J (green) on reel 1 top; Q (purple) on reel 3; WILD (newspaper) on reel 4; K (blue) on reel 5.",
      "win_shown": "WIN $0.40 at bottom (payline win concurrent with trigger). LINE 18 PAYS $0.40.",
      "credit": "CREDIT $99,849.20, BET $2.00"
    },
    "bonus_feature_gamble": {
      "type": "bonus (Feature Gamble selection screen)",
      "file": "bonus_feature_gamble.png",
      "description": "The Feature Gamble screen after a BONUS trigger. The initially awarded feature (CANARY WHARF) is prominently displayed in a large dark green centered banner with ornate gold frame. Text reads 'CANARY WHARF FREE SPINS' in gold letters on a green background.",
      "hierarchy_panel_right": "On the right side of the screen, a vertical stack of 5 feature tiles shows the full Feature Gamble ladder from bottom to top (Pentonville at bottom, End of the Line at top). In this screenshot (from bonus_feature_gamble.png), the tiles shown are Canary Wharf as the currently-won feature. Other tiers appear locked (chain/padlock icons visible on locked tiers).",
      "controls_not_visible": "The COLLECT and GAMBLE buttons are likely behind the current overlay; this frame appears to be the feature announcement moment rather than the choice moment.",
      "win_preserved": "WIN $0.40 at bottom (pre-existing win from trigger spin).",
      "credit": "CREDIT $99,849.20, BET $2.00"
    },
    "feature_gamble_collect_or_gamble": {
      "type": "bonus (Feature Gamble — COLLECT or GAMBLE decision screen)",
      "file": "feature_gamble_collect_or_gamble.png",
      "description": "The player has been awarded BUCKINGHAM PALACE (after gambling up from Canary Wharf). The screen shows 'CONGRATULATIONS!' in large gold 3D letters at the top. Below it: 'YOU HAVE WON' with the 'BUCKINGHAM PALACE' feature badge (cream/gold). Center shows two large buttons: COLLECT (left, bright red circular button) and GAMBLE (right, green circular button). The next tier 'END OF THE LINE FREE SPINS' is highlighted at the very top of the hierarchy panel on the right.",
      "gamble_text": "DO YOU WISH TO COLLECT OR RISK FOR END OF THE LINE FREE SPINS?",
      "loss_warning_text": "LOSING THE GAMBLE WILL RESULT IN A RANDOM MYSTERY PRIZE BETWEEN $16.00 AND $48.00",
      "gamble_probability_text": "THE CHANCE TO WIN THE GAMBLE IS 50.67%",
      "mystery_prize_range_source": "zoom crop _gamble_bottom_text.png — text clearly legible",
      "hierarchy_right_panel": "Vertical list from top to bottom: END OF THE LINE (top, highlighted/active — the gamble target), BUCKINGHAM PALACE (currently won, glowing with green badge), CANARY WHARF (previous tier, dimmed), KING'S CROSS, PENTONVILLE (bottom). When COLLECT is chosen, Buckingham Palace FS begins. When GAMBLE is chosen, 50.67% chance of getting End of the Line, 49.33% chance of losing (mystery prize).",
      "colors_described": "COLLECT button: large dark red/crimson circular metal-looking button with 'COLLECT' in white. GAMBLE button: large bright green circular button with 'GAMBLE' in white. Both are clearly labeled — color-blind users can rely on text.",
      "colorblind_notes": "The COLLECT and GAMBLE buttons are both labeled clearly in white text and have distinct circular shapes. The text labels are the primary identifier, not color alone."
    },
    "free_spins_buckingham": {
      "type": "free_spins (Buckingham Palace — start/first spin)",
      "file": "free_spins_buckingham.png",
      "description": "Buckingham Palace Free Spins active. The background behind the reels has changed entirely to an illustration of Buckingham Palace: a large neoclassical cream/white stone building with columns and decorative bas-reliefs, under a pale blue sky. The building occupies the full width behind the reel grid.",
      "feature_badge": "Top-right corner: small rectangular badge reading 'BUCKINGHAM' in white text on dark teal/green background with a checkmark icon — confirming which free-spins variant is active.",
      "visible_symbols": "WILD symbols on reels (two WILD newspaper symbols visible). Character symbols (lady in bonnet, witch/sorceress). Royal K (blue), Q (purple), A (red), J (green).",
      "win_shown": "WIN $24.40 at bottom.",
      "spins_counter": "Bottom bar center area (instead of the HOLD SPACE text) would show free spins remaining — in this frame it shows WIN $24.40.",
      "reel_appearance": "Standard 5x4 grid; the mahogany cell borders remain. The Buckingham Palace backdrop replaces the dark tunnel."
    },
    "free_spins_buckingham_play": {
      "type": "free_spins (Buckingham Palace — mid-spin)",
      "file": "free_spins_buckingham_play.png",
      "description": "Buckingham Palace FS in motion. Reels 2, 3, 4, 5 are shown spinning (blurred symbol columns indicating mid-spin animation). Reel 1 has already stopped — showing WILD (top) and K (blue, below).",
      "feature_badge": "Top-right: 'BUCKINGHAM' badge (same as above).",
      "spins_counter": "Bottom bar shows 'FREE SPINS LEFT 6' — 6 remaining spins at this point in the round.",
      "win_shown": "WIN $24.40 (accumulated so far in this feature round).",
      "wild_behavior_visible": "The stacked vertical WILD symbol visible on reel 1 — confirming the fully stacked vertically WILD mechanic described in the rules."
    },
    "win_screen_fs": {
      "type": "win_screen (FS coin shower transition)",
      "file": "win_screen_fs.png",
      "description": "A transitional animation screen shown after the Buckingham Palace FS round ends, before the final total win is displayed. Full screen is dark navy/cobalt blue with a dramatic bright light-blue glow radiating from the center. Dozens of gold coins (circle with relief, warm gold) rain across the entire screen in various sizes. A stylized London Underground tube train — green carriage, silver highlights, circular headlights — flies through the center of the screen toward the viewer.",
      "text_visible": "The game logo 'DOWN THE RAILS' is partially visible at the top (dark/shadowed). Bottom-left shows 'CREDIT $99,849.20' and 'BET $2.00' from the main bar — partially legible. Right side: partial text 'MAJESTYS W' (obscured by animation).",
      "purpose": "Celebratory animation bridge between FS gameplay and the win congratulations screen.",
      "colorblind_notes": "The transition is animation-only; no interactive elements. The win total is presented on the next screen (win_screen_fs_buckingham.png) in text."
    },
    "win_screen_fs_buckingham": {
      "type": "win_screen (Buckingham Palace FS final win)",
      "file": "win_screen_fs_buckingham.png",
      "description": "The final congratulations screen after Buckingham Palace Free Spins. Dark wood-brown background with subtle dark stone-arch frame elements at the sides.",
      "text_hierarchy": [
        "CONGRATULATIONS! — large gold 3D lettering with dark shadow, top half of screen.",
        "YOU HAVE WON — smaller white serif text below the main title.",
        "$635.00 — very large bold yellow/gold text in a horizontal banner, center of screen. This is the total win from the Free Spins round.",
        "IN 8 FREE SPINS — white text below the win amount.",
        "PRESS ANYWHERE TO CONTINUE — small white text at the bottom."
      ],
      "win_amount": "$635.00",
      "spins_played": "8 free spins",
      "source": "win_screen_fs_buckingham.png — text clearly legible, OCR and visual confirmed",
      "colorblind_notes": "Win amount shown as explicit text ($635.00). No color-only encoding of the win value."
    },
    "win_screen_huge_win": {
      "type": "win_screen (Huge Win overlay — base game)",
      "file": "win_screen.png",
      "description": "A Huge Win celebration overlay shown on top of the base game reels during a high-value spin. The background is a full-screen bright electric blue radial flash (very bright at the center, deepening to navy at the edges). The reels are faintly visible behind the overlay.",
      "text_hierarchy": [
        "HUGE WIN! — large gold 3D block letters with bright orange-yellow fill and dark shadow, top of overlay.",
        "$93.60 — very large gold text on a dark teal horizontal plaque with gold filigree border, center of screen."
      ],
      "win_amount": "$93.60",
      "win_amount_note": "Confirmed by zoom crop _hugewin_amount.png (x5 scale). OCR of the raw screenshot initially read $98.60 due to stylized font — visual zoom confirms $93.60 unambiguously.",
      "bottom_context": "The reels behind the overlay show WILD symbols (two WILD newspaper icons visible through the glow). Bottom bar: CREDIT $100,089, BET $3.60 (partially legible — bet changed from $2), WIN $75.00 and LINE 3 PAYS... (partial, behind overlay).",
      "colorblind_notes": "Win amount text is the primary information carrier. The blue flash is decorative animation."
    },
    "feature_big_smoke_announce": {
      "type": "other (The Big Smoke random feature announcement)",
      "file": "feature_big_smoke_announce.png",
      "description": "Feature announcement screen displayed before the Big Smoke modifier plays out. Full screen shows a London Underground tube carriage front on — dark green, very large, filling the center of the screen. Carriage has silver trim, dark windows showing seats, and two circular headlights.",
      "text": "On the carriage, overlaid in large stylized gold letters: 'THE BIG SMOKE'. Below the carriage, in the bottom bar area: 'GOOD LUCK!'",
      "credit_shown": "CREDIT $99,923.00, BET $2.00.",
      "purpose": "Alert the player that the Big Smoke random modifier is about to play — the colossal symbol will appear next spin.",
      "colorblind_notes": "Text 'THE BIG SMOKE' is displayed clearly. The feature name text is the primary identifier."
    },
    "feature_big_smoke_play": {
      "type": "other (The Big Smoke — colossal symbol active)",
      "file": "feature_big_smoke_play.png",
      "description": "The Big Smoke modifier is in play. A colossal character symbol — the witch/sorceress character (long dark hair, crooked nose, holding apple) — fills the majority of the left side of the reel grid. The colossal symbol spans approximately 3 reels wide and 3 rows tall (a 3x3 supersymbol), completely replacing those cells. It is framed by an extra-thick ornate gold frame that spans multiple cells.",
      "remaining_reels": "Reels 4-5 (right side) show regular symbols: lady in bonnet (character 4), A (red), J (green), K (blue), and the playwright (character 3).",
      "win_shown": "WIN $0.75. WINNER label visible at bottom.",
      "credit": "CREDIT $99,864.55, BET $2.00.",
      "colorblind_notes": "The colossal symbol is visually distinct by its large size spanning multiple cells, not only by color."
    },
    "feature_wild_strips": {
      "type": "other (Wild Strips — Wild Strip modifier active)",
      "file": "feature_wild_strips.png",
      "description": "The Wild Strips random modifier has placed a full reel of WILD symbols (a 'Wild Strip') on reel 3 (center reel). All 4 cells of reel 3 are replaced with WILD symbols. Each cell shows the standard WILD newspaper image, but at full column height.",
      "wild_strip_visual": "The center reel appears to contain an elongated vertical version of the WILD image — an escalator/staircase viewed from above with small figures (in the zoomed crop: a perspective view of an underground station staircase with 'DOWN THE RAILS' branding visible at the bottom). This is the Wild Strip reel art.",
      "green_glow": "A bright acid-green glow outline surrounds the entire middle reel (Wild Strip) column, clearly identifying it as active.",
      "surrounding_reels": "Reels 1-2 and 4-5 show character symbols: playwright (character 3), K (blue), Q (purple), J (green), A (red), and the portly politician (character 2).",
      "win_shown": "WIN $1.20. WINNER label visible at bottom.",
      "credit": "CREDIT $99,958.20, BET $2.00.",
      "colorblind_notes": "The Wild Strip is a full reel — its location and full-column extent is size-based, not color-based. The green glow is supplementary."
    }
  },

  "features": {
    "random_spin_features": {
      "overview": "In the base game, at any spin, one of 5 features can be triggered randomly without any player action.",
      "source": "rules_p2.png",
      "features": [
        {
          "name": "TUNNEL VISION",
          "symbol": "A special MYSTERY symbol that appears only during this feature. Described but symbol appearance not clearly identifiable from available frames — likely a dark circular/tunnel-eye icon.",
          "mechanic": "MYSTERY symbols hit randomly on the screen. Then all of them transform into the same paying symbol (all become the same random high-value symbol, creating big clusters).",
          "captured": false,
          "captured_note": "Not captured as a standalone screenshot. Referenced in rules_p2.png."
        },
        {
          "name": "THE BIG SMOKE",
          "symbol": "None — a colossal symbol appears directly on the reels.",
          "mechanic": "Whenever the feature hits, one 3x3 colossal paying symbol (or BONUS symbol) is added to the screen on reels 1, 2, 3, or 4. Then the game pays according to winning combinations with the colossal symbol, or triggers the BONUS if the colossal symbol is a BONUS.",
          "colossal_size": "3x3 (three reels wide x three rows tall — fills 9 cells)",
          "possible_colossal_symbols": "Any paying symbol (character or royal) or BONUS",
          "captured": true,
          "captured_files": ["feature_big_smoke_announce.png", "feature_big_smoke_play.png", "base_game_big_smoke.png"],
          "example_win": "$42.60 (LINE 2 PAYS $0.60 shown in base_game_big_smoke.png — this appears to be with a colossal K symbol; actual win $42.60 in credit rollup from $99,989 to prev)"
        },
        {
          "name": "WILD STRIKE",
          "symbol": "Regular WILD symbols (newspaper) in random positions.",
          "mechanic": "WILD symbols are added to the screen in random positions. The number of WILDs added is not specified in the OCR/rules text.",
          "captured": false,
          "captured_note": "WILD STRIKE (adding random WILDs to screen) is separate from WILD STRIPS (full reel Wild). No dedicated WILD STRIKE screenshot captured; rules_p2.png describes it."
        },
        {
          "name": "SHIFTING STACK",
          "symbol": "A special SHIFTING STACK WILD symbol that appears only during this feature.",
          "mechanic": "SHIFTING STACK WILD symbols are added to the reel strips. When the spin plays, all new WILD symbols are brought fully into the screen to cover all positions on that reel (a full-reel WILD stack). Additionally, SHIFTING STACK WILDs carry a random multiplier of x2 or x3 that applies to all winning combinations passing through them.",
          "captured": false,
          "captured_note": "Not captured as a standalone screenshot. Referenced in rules_p2.png."
        },
        {
          "name": "BONUS BLITZ",
          "symbol": "None — directly awards the BONUS feature.",
          "mechanic": "Randomly the BONUS feature can be awarded by the BONUS BLITZ modifier without landing 3 BONUS scatter symbols.",
          "captured": false,
          "captured_note": "Not captured as a standalone screenshot. Referenced in rules_p2.png."
        },
        {
          "name": "WILD STRIPS (confirmed visual)",
          "symbol": "A full-column WILD reel strip — the entire reel is converted to WILD.",
          "mechanic": "One or more complete reels become WILD (all 4 rows on that reel are WILD). The Wild Strip visual is an escalator/staircase viewed from above with DOWN THE RAILS branding. Green glow border around the active Wild Strip reel.",
          "captured": true,
          "captured_files": ["feature_wild_strips.png"],
          "example_win": "$1.20",
          "note": "OCR of rules_p2.png calls this 'WILD STRIKE' — but the screenshot feature_wild_strips.png is labeled 'WILD STRIPS' in the manifest. The rules also separately mention 'SHIFTING STACK' which involves full-reel WILDs. This may be the Shifting Stack (full-reel WILD). Exact mapping of screenshot to feature name is uncertain — see unreadable_or_uncertain."
        }
      ]
    },

    "bonus_feature": {
      "trigger": "Hit 3 or more BONUS symbols (green tube train carriages) anywhere on the screen (any reels, any positions). Can also be triggered directly by the BONUS BLITZ random feature or by triggering END OF THE LINE directly.",
      "trigger_source": "rules_p3.png: 'Hit 3 or more BONUS symbols anywhere on the screen to trigger the BONUS feature or trigger the END OF THE LINE round directly.'",
      "captured": true,
      "captured_file": "bonus_trigger.png",
      "sequence": "After trigger: 1 of 5 possible features is initially selected randomly → Feature Gamble screen appears."
    },

    "feature_gamble": {
      "description": "Shown after BONUS trigger. 5 different features can be awarded, arranged in an ascending value hierarchy. During Feature Gamble the player can collect the currently awarded feature or gamble to try for the next higher tier.",
      "hierarchy_bottom_to_top": [
        "1. PENTONVILLE (lowest tier)",
        "2. KING'S CROSS",
        "3. CANARY WHARF",
        "4. BUCKINGHAM PALACE",
        "5. END OF THE LINE (highest tier)"
      ],
      "gamble_mechanic": "The currently awarded feature is shown. Player can choose to COLLECT (play that feature) or GAMBLE (attempt to win the next tier up). If gamble succeeds, the next feature is awarded and the player can COLLECT or GAMBLE again. If gamble fails, instead of a feature a single mystery random prize is awarded (direct money payout from 4x to 24x total bet).",
      "gamble_ends_when": "The current feature is collected; OR the END OF THE LINE is reached (it is automatically collected — cannot gamble beyond it); OR a gamble is lost.",
      "mystery_prize": "4x to 24x total bet (from rules_p3 OCR). At $2.00 bet this is $8.00 to $48.00. Visual on collect-or-gamble screen at $2.00 bet shows '$16.00 AND $48.00' — minimum in that specific state, likely varies by current tier.",
      "mystery_prize_source": "rules_p3.png: '4x to 24x total bet'. Visual screen: '$16.00 AND $48.00' at $2.00 bet from _gamble_bottom_text.png zoom.",
      "gamble_win_probability": "50.67% (shown on the collect-or-gamble screen for this specific gamble step — may vary per step).",
      "gamble_probability_source": "_gamble_bottom_text.png zoom: 'THE CHANCE TO WIN THE GAMBLE IS 50.67%'",
      "captured": true,
      "captured_files": ["bonus_feature_gamble.png (Canary Wharf shown as awarded feature)", "feature_gamble_collect_or_gamble.png (Buckingham Palace won, offered to gamble for End of the Line)"],
      "colorblind_notes": "COLLECT button (red) and GAMBLE button (green) both have clear text labels. Shape, position, and text are primary identifiers."
    },

    "pentonville_free_spins": {
      "name": "PENTONVILLE",
      "spins_awarded": 5,
      "mechanic": "Cluster-respin mechanic. During the round, whenever winning combinations are formed with any symbol, the winning symbols are marked, forming a cluster. The game then respins. At the end of each respin, all symbols that would form winning combinations with the marked ones are added to the cluster. Respins end when no more symbols that could be added to the cluster hit. After respins end, the game pays for all winning combinations on screen.",
      "retrigger": "Cannot be retriggered (rules_p3.png: 'The feature cannot be retriggered.').",
      "background": "Not observed (not captured). Presumed to be a Pentonville tube station themed backdrop.",
      "captured": false,
      "captured_note": "not_captured — did not trigger in 350 spins; no bonus buy available.",
      "source": "rules_p3.png"
    },

    "kings_cross_free_spins": {
      "name": "KING'S CROSS",
      "spins_awarded": 5,
      "mechanic": "During the round, in the middle reels, spots are marked in a cross pattern. Whenever a WILD symbol hits in any of the marked spots, all symbols in the remaining marked spots transform into WILD.",
      "retrigger": "Cannot be retriggered.",
      "background": "Not observed (not captured).",
      "captured": false,
      "captured_note": "not_captured — did not trigger in 350 spins; no bonus buy available.",
      "source": "rules_p4.png, zoom crop _kc_detail.png: 'KING'S CROSS is a free spins feature. The round awards 5 free spins.'"
    },

    "buckingham_palace_free_spins": {
      "name": "BUCKINGHAM PALACE",
      "spins_awarded": 8,
      "mechanic": "During the round, a new fully stacked vertical WILD symbol is present on the reel strips. Whenever the symbol hits, if it is outside of the screen it will move up or down to cover positions on that reel. Then all of the character symbols will transform into the highest paying one (the Henry VIII character, paying $50.00 for 5 at $2.00 bet).",
      "retrigger": "Cannot be retriggered.",
      "background": "Buckingham Palace — large neoclassical cream/white stone building under pale blue sky, illustrated style, fills entire reel backdrop.",
      "feature_badge": "BUCKINGHAM badge in top-right corner (teal/green background, white text, checkmark icon).",
      "captured": true,
      "captured_files": ["free_spins_buckingham.png", "free_spins_buckingham_play.png", "win_screen_fs.png", "win_screen_fs_buckingham.png"],
      "example_total_win": "$635.00 in 8 free spins",
      "example_win_source": "win_screen_fs_buckingham.png: 'YOU HAVE WON $635.00 IN 8 FREE SPINS'",
      "source": "rules_p4.png"
    },

    "canary_wharf_free_spins": {
      "name": "CANARY WHARF",
      "spins_awarded": 8,
      "mechanic": "A new COLLECT symbol appears during the round. During the round, at random spins, the character symbols can show a random money value of 1x to 50x total bet. If the COLLECT symbol hits on the same spin, all displayed values are collected and awarded.",
      "retrigger": "Cannot be retriggered.",
      "background": "Not observed (not captured during gameplay — was shown in Feature Gamble screen as the initially won feature, but player gambled to Buckingham Palace before collecting it).",
      "captured": false,
      "captured_note": "not_captured for gameplay — was shown as selected in bonus_feature_gamble.png (announcement frame only). Full gameplay and win screens not captured.",
      "source": "rules_p4.png"
    },

    "end_of_the_line_hold_respin": {
      "name": "END OF THE LINE",
      "type": "Hold & Respin",
      "trigger_path": "Either: (a) triggered directly by a BONUS scatter trigger (rules_p3.png: 'or trigger the END OF THE LINE round directly'), or (b) won through Feature Gamble by gambling up from Buckingham Palace.",
      "starting_grid": "3x5 positions (3 rows x 5 reels) at start, can extend up to 5x5 positions during play via EXPAND symbol.",
      "respins": "Starts with 3 respins. Reset to 3 whenever any symbol hits.",
      "round_end_conditions": "Round ends when: no more respins left, OR the whole grid is covered with MONEY symbols.",
      "payout_calculation": "When round ends: values of all MONEY symbols on screen are summed, any MULTIPLIER is applied, and the game pays the total.",
      "special_symbols": {
        "MONEY": "Character portrait symbols become MONEY symbols, each taking a random value from: 1x, 2x, 3x, 4x, 5x, 10x, 15x, 20x, 25x, 30x, 35x, 40x, 45x, 50x, 100x, 200x, 300x, 500x, 1000x, or 2500x total bet. Once landed, they remain on screen until round ends.",
        "EXTRA_LIFE": "A red heart symbol (rules_p5.png zoom: gold-framed red heart icon). Collected in a meter at top. Every 3 collected = 1 additional Extra Life, which resets respins to 3 if they ever reach 0.",
        "PRIZE_BOOST": "A green diamond/gem with a pound-sterling symbol inside (green rhombus icon). Collected in a meter at top. Every 3 collected = all MONEY symbol values on screen increase to the next higher value in the table.",
        "EXPAND": "An expand symbol (appearance not clearly captured — described in rules_p6.png). Collected in meter at top. Every 3 collected = 1 more row of empty positions unlocked on the grid (can add up to 2 extra rows, maximum 5x5 grid).",
        "MULTIPLIER": "A multiplier symbol (appearance not clearly captured). Collected in meter at top. Every 3 collected = multiplier increases: first x2, then x3, then x5. Applied to total win at round end."
      },
      "max_win_cap": "5,000x bet applies — if total win reaches 5,000x bet the round ends immediately with all remaining features forfeited.",
      "captured": false,
      "captured_note": "not_captured — most rare feature (requires either direct scatter trigger to End of the Line or successful gamble up through entire Feature Gamble hierarchy from Pentonville to End of the Line). Did not trigger in 350 spins. No bonus buy available.",
      "source": "rules_p5.png and rules_p6.png"
    }
  },

  "not_captured": [
    {
      "feature": "PENTONVILLE Free Spins",
      "reason": "Did not trigger naturally in 350 spins. No bonus buy available. Gameplay, backdrop, and win screen not captured."
    },
    {
      "feature": "KING'S CROSS Free Spins",
      "reason": "Did not trigger naturally in 350 spins. No bonus buy available. Gameplay, backdrop, and win screen not captured."
    },
    {
      "feature": "CANARY WHARF Free Spins",
      "reason": "Was announced as the initially won feature in bonus_feature_gamble.png but player gambled to Buckingham Palace before collecting. Gameplay and win screen not captured."
    },
    {
      "feature": "END OF THE LINE Hold & Respin",
      "reason": "Most rare feature. Did not trigger in 350 spins. Would require either direct END OF THE LINE scatter trigger or successful gamble through the full Feature Gamble hierarchy. No bonus buy available."
    },
    {
      "feature": "TUNNEL VISION random feature",
      "reason": "Mystery symbol appearance and gameplay not observed. Rules described in rules_p2.png."
    },
    {
      "feature": "WILD STRIKE random feature",
      "reason": "Rules described in rules_p2.png but not observed in distinct screenshot. Note: feature_wild_strips.png may show Shifting Stack (full reel WILD) rather than Wild Strike — see unreadable_or_uncertain."
    },
    {
      "feature": "SHIFTING STACK random feature",
      "reason": "Gameplay not captured in dedicated screenshot. May overlap with feature_wild_strips.png — uncertain. Rules in rules_p2.png."
    },
    {
      "feature": "BONUS BLITZ random feature",
      "reason": "Not observed triggering. Rules described in rules_p2.png only."
    }
  ],

  "unreadable_or_uncertain": [
    {
      "item": "feature_wild_strips.png vs WILD STRIKE vs SHIFTING STACK",
      "detail": "The manifest labels one screenshot 'WILD STRIPS'. OCR of rules_p2.png calls one feature 'WILD STRIKE' (random WILD symbols added) and another 'SHIFTING STACK' (full-reel WILD stack with 2x/3x multiplier). The screenshot shows a full-reel WILD — this is more consistent with SHIFTING STACK than WILD STRIKE. The correct feature name for the full-reel WILD captured in feature_wild_strips.png is uncertain. Provisionally documented as 'Wild Strips / possibly Shifting Stack' in features section.",
      "impact": "Medium — affects feature naming. Payouts/mechanics remain accurate."
    },
    {
      "item": "HUGE WIN amount OCR discrepancy",
      "detail": "OCR of win_screen.png read '$98.60'. Zoom crop (x5, _hugewin_amount.png) clearly shows '$93.60'. The stylized 3D font caused OCR to misread the '3' as '8'. Confirmed as $93.60.",
      "impact": "Low — zoom confirmed value."
    },
    {
      "item": "Mystery prize range from rules_p3.png vs on-screen display",
      "detail": "rules_p3.png OCR: mystery prize is 'a direct money award from 4x to 24x total bet'. Collect-or-gamble screen at $2.00 bet shows '$16.00 AND $48.00'. At $2.00 bet: 4x = $8.00 and 24x = $48.00 — but screen shows $16.00 as minimum, not $8.00. This may mean the minimum floor changes per Feature Gamble tier position (when gambling for End of the Line from Buckingham Palace, the minimum is 8x = $16.00 rather than 4x). The exact minimum-per-tier formula is not documented on available screens.",
      "impact": "Low — both sources are captured. Range is confirmed as $16.00–$48.00 for the Buckingham→End of the Line gamble step at $2.00 bet."
    },
    {
      "item": "EXPAND and MULTIPLIER symbol appearances in End of the Line",
      "detail": "rules_p6.png describes EXPAND and MULTIPLIER symbols but the icons are not clearly discernible from the rules page at standard resolution. No End of the Line gameplay captured to show the symbols in action.",
      "impact": "Medium — End of the Line is documented from rules text but visual appearance of EXPAND and MULTIPLIER symbols cannot be confirmed."
    },
    {
      "item": "SHIFTING STACK specific reel position behavior",
      "detail": "rules_p2.png OCR: '...RESHIFTING STACK WILDS carry a random multiplier of x2 or x3 that applies to all winning combinations that pass though them.' The specific rule for how the stack shifts position (if it does) vs remaining fixed is not fully legible in OCR.",
      "impact": "Low — core mechanic (full-reel WILD with 2x or 3x multiplier) is documented."
    },
    {
      "item": "King's Cross free spins count discrepancy",
      "detail": "Manifest note says '8 FS + WILD в кластер' (8 free spins). Rules_p4.png OCR and zoom crop _kc_detail.png clearly state 'The round awards 5 free spins.' Confirmed as 5, not 8. The manifest was incorrect.",
      "impact": "Medium — corrected in this document. King's Cross = 5 free spins."
    },
    {
      "item": "Canary Wharf money values range",
      "detail": "rules_p4.png: 'random money value of 1x to 50x total bet.' This is the character symbol overlay values during Canary Wharf FS — distinct from the End of the Line money symbol values (1x–2500x). Confirmed as 1x–50x for Canary Wharf.",
      "impact": "Low — confirmed from OCR."
    },
    {
      "item": "WILD symbol reel placement restriction",
      "detail": "Paytable text says 'WILD symbol appears on all reels.' The paytable crop is confirmed. However, during Buckingham Palace FS a 'fully stacked vertical WILD' is mentioned as a new WILD added to reel strips — whether the standard WILD has any reel restriction in base game is not explicitly stated beyond 'all reels'.",
      "impact": "Low — documented as 'appears on all reels' per paytable."
    }
  ]
}