表か裏か · 連勝で×836
Call the koban coin — heads or tails — and let it ride. Each correct call doubles the ride; a full streak runs to ×836.
The coin is fifty-fifty; the game is knowing when to stop.
Every round of Koban Flip publishes verifiable fairness data, so you can check any result yourself — see how verification works.
Yes. Every Betkyo original can be played free with fun money — no account or deposit needed. Sign in only when you want to play with crypto.
Riding a perfect streak pays up to ×836.
Yes. Every Betkyo original publishes verifiable fairness data for each round, so you can check results yourself. The fairness page explains the exact scheme and walks through a verification.
18+ only. Please play responsibly.