Limbo
Pick a target number and bet on whether the roll lands under it or over it. The riskier your target, the bigger the payout.
How To Play
- Set your bet with − and +, halve or double it with ½ and 2x, type an amount, or pick one from the list. Bets range from $0.10 to $100.00.
- Choose Roll Under or Roll Over.
- Drag the slider to set your target. The multiplier and win chance update as you move it.
- Press Play. A number from 0.00 to 99.99 is rolled.
Winning
- Roll Under wins when the roll is below your target. Under 50 wins on 0.00 to 49.99.
- Roll Over wins when the roll is equal to or above your target. 50 or over wins on 50.00 to 99.99.
- A win pays your bet × the multiplier. If you lose, you lose your bet.
- Win chance can be set from 2% to 97%. The lower the chance, the higher the multiplier, from 1.01x up to 49.00x.
Example: $2.00 on Under 50 has a 50% win chance and a 1.96x multiplier. A roll of 32.18 wins $3.92.
Auto Play
- Choose how many rounds to play (5 to 1,000, or ∞) and a game speed: slow, medium or fast.
- Press Stop Auto at any time. Auto play also stops if your balance is lower than your bet.
Settings
- Round History shows your last 50 rounds. Select the details icon, or any recent result above the slider, to see a round in full.
- Provably Fair shows the seeds every roll is made from, so you can check that no result was changed after you bet.
- Disable Animations shows results instantly.
- Space To Bet lets you press Space to play a round.
Return To Player
The theoretical return to player (RTP) is 97.18% to 98.00%, depending on your target. Multipliers are rounded down to two decimal places.
Malfunction voids all pays and plays.
Provably Fair
Every roll is worked out from seeds that are fixed before you bet. The server shows you a hash of its seed up front and reveals the seed itself when you rotate, so you can check that no result was changed after you played.
Active Seeds
Rotating reveals the server seed above, then uses the next one with your client seed. Closing the game deletes its seeds, so reveal them before you leave.
Revealed Seeds
None yet.
How To Check A Roll
- The SHA-256 hash of the revealed server seed must match the hash shown before you bet.
- Work out HMAC-SHA256, keyed with the server seed, of client seed:nonce:0. The nonce is the bet's number with those seeds, starting at 0.
- Read the result 4 bytes at a time as big-endian numbers. Skip any that are 4,294,960,000 or more. Take the first one left, find its remainder when divided by 10,000, then divide that by 100. That's the roll.
Each round's details show its seeds and nonce, and the game checks every round for you once its seed is revealed.