Dice
A provably fair game ("jeu de dés") where you bet if a random number lands over or under a target you pick.
Crypto casino dice has nothing to do with real dice. The game spits out a number, say anywhere from 0.00 to 100.00, and you bet "over" or "under" a target you choose. The less likely your pick, the bigger the payout.
Where the number comes from
A popular method grabs one float (between 0 and 1) from the HMAC result, multiplies it by 10,001, cuts off the decimals and divides by 100. That gives you a roll from 0.00 up to 100.00. Some casinos use another range or formula, so check their fairness page before you verify.
Why it matters
It's the easiest provably fair game to check, and the house edge is usually low, often around 1%. That's also why bonus terms often limit it or count it at a low rate toward wagering.
Real-life example
You put 10 $ on "under 49.50". That's about a 49.5% shot, and with the casino keeping 1%, you get paid roughly double. The roll comes up 37.12. You win.