About the game
A score-attack game for iOS and Android where each stage wears a unique cinematic skin — crossing a suspension bridge, opening a door, following a fairy in the woods — but underneath spins a red-or-black roulette. Match the spin to advance; miss it to lose the run. The third outcome, "Green 0", lurks in the wheel: when it lands, neither red nor black saves you.
The Monty Hall problem. The Two Envelopes problem. The St. Petersburg paradox. Counterintuitive probability events are baked into the stage mechanics. Just by playing, you'll feel why "switching is better," "passing is better," or "accepting is better."
Stages (11 in total)
- The Rotting Suspension Bridge (50/50)
- Forked Path Through the Woods (50/50, mist and beasts)
- Three Doors (Monty Hall, rare stay-wins pay double)
- The Two Cabins (50/50 + history)
- The Fairy and the Demon (50/50 + history)
- The Two Chests (Two Envelopes, with a sage's opening monologue)
- The Legendary Sword (50/50)
- The Mouth of Truth (offer for -25% safe passage or wager for x2 or death)
- The Flaming Tower (true St. Petersburg paradox — climb to double the multiplier or burn out)
- Three Fates (boss, three dragon-headed towers, a 1/3 single-shot trial with a x10 multiplier reward)
- The Bayesian Sage (finale, declare yourself from six factions and earn a bonus based on session stats)
Clearing the sage loops the run back to stage 1, carrying the x10 multiplier and the sage bonus into a fresh lap of the cinematic eleven-stage arc.
Global Leaderboard (new in v3.0)
Compete on three axes — best score, best stage, and total runs — across four windows: all-time, today, this week, and this month. Pick a player name on first launch (or hit the "Auto-pick" button to generate one like "Wanderer#1234"). Change it any time from Settings.
On iOS you can optionally link your Apple ID, and on Android your Google account, so your ranking carries over when you switch phones or reinstall the app. Linking is optional and all features remain available without it.
In-App Purchases
The full game is free to play. Two optional in-app purchases are available:
- "Remove Ads" ($1.99, one-time, non-consumable): Banner and interstitial ads are completely hidden. Rewarded videos remain available.
- "10 Tickets Pack" ($2.99, consumable): Lets your ticket balance exceed the soft cap of 10 up to a hard cap of 99.
Tickets can be earned for free at +3 per day and +1 per rewarded video (once daily). Payments are processed by the platform's native billing system (Apple StoreKit / Google Play Billing).
Support
For bugs, feedback, or questions, please email us. Both English and Japanese are supported.