No real money. No signup. No risk.
Your balance lives in this browser only via localStorage — it isn’t real and isn’t worth anything. Reset it any time from the controls panel. Every bet still uses real provably-fair machinery (HMAC-SHA256), so you can verify outcomes the same way you would on Stake, Shuffle or any of the other casinos WinLogger tracks. Click Provably Fair in the controls to inspect, rotate or audit your seeds.
Limbo — Rules & Provably Fair
How to play
Set a target multiplier (minimum 1.01×). Each round generates a random multiplier. If the rolled value is at or above your target, you win bet × target. Otherwise the bet is lost.
Math
The rolled multiplier follows a Stake-style formula:
else → m = floor(99 / (1 − f)) / 100
where f is a uniform [0, 1) float derived from the HMAC. The f < 0.01 branch is the 1% house edge — one in a hundred rounds insta-busts.
Win probability at target T: 99 / T percent. So a 2.00× target wins 49.5% of the time, a 10× target wins 9.9%, a 100× target wins 0.99%.
Provably fair
Each round uses HMAC-SHA256(server_seed, client_seed:nonce). The server seed is committed (SHA-256 hash shown) before play and revealed when you rotate seeds, so every past round can be re-derived and checked.