Provably fair Plinko
Every Plinko drop on Aurion is provably fair: the ball's path is fixed by seeds before you drop it, one of which you can set yourself, and you can recompute any drop afterwards. Free with virtual coins. No real money, no deposit.
How the ball's path is decided
- You have your own seed pair: a secret server seed, of which we only show the SHA-256 hash, and a client seed you can change at any time. A nonce counts your drops: 0, 1, 2, …
- For each drop we turn HMAC-SHA256(server seed, "client seed:nonce:cursor") into a stream of random numbers between 0 and 1, one per row of pegs.
- At each row the ball goes right if its number is below 0.5, and left otherwise. The number of right bounces is the bucket it lands in, and the paytable for your rows (8, 12 or 16) and risk level gives the multiplier.
- Rotate your seed pair in the game's Fairness panel to reveal the old server seed. You can then check its hash and recompute every drop you made with it.
Verify a round
Paste a bet ID, or enter the revealed server seed, your client seed and the nonce, then press Verify.
Play it free
Drop a few balls, rotate your seed, then come back and check them.
Questions
- Is online Plinko rigged?
- Not here. The path of every ball is fixed by a server seed we commit to before you drop and a client seed you control, so neither side can steer it. You can recompute any drop once the seed is revealed.
- Can I choose where the ball lands?
- No. You can change your client seed, which changes the outcomes, but you can't know them in advance because the server seed stays secret until you rotate it.
- Why do I have to rotate my seed to verify?
- While a server seed is in use it must stay secret, or future drops could be predicted. Rotating retires it and reveals it, so every drop made with it can be checked.
- What is the RTP of Plinko?
- Each paytable is scaled to about 95% return to player. Higher risk levels spread the same return across rarer, bigger multipliers.
- Is this Plinko game free?
- Yes. You play with free virtual coins. There are no real-money bets and no withdrawals.