DEAD MAN'SCUP
A pirate dice duel. Set your own line, shake five dice out of a dead man's cup against Blackjaw, and beat the total you chose, or Blackjaw takes the stake. One shake in twenty the kraken rises and multiplies a win by ×2 to ×10.
One Curve. One Decision.
Dead Man's Cup is a dice duel on the same committed-seed core as the other titles. Five dice, 7,776 equally likely rolls, and one dial: the line. Win above a total, or on it and below, and the multiplier moves the other way, from ×1.05 at an 84.8% chance up to ×6,951.01 at one roll in 7,776. The house edge is exactly 1% at every rung, so RTP is 99% wherever the line sits, and the kraken die pays for itself.
Set Your Own Odds
The barrel under the board shows every total from 5 to 30, each bar as tall as that total is likely, green where you win. Drag the knob, or type a line, a multiplier or a chance: the three fields are one dial, and OVER and UNDER mirror each other to the last decimal.
One Press, Five Dice
The cup shakes, tips and pours five dice across the deck. The roll is drawn on the server before the cup moves, so the tumble is playback of a decided total, and the total is branded into the planks the moment the dice settle.
The Purse Or The Pirate
Land above your line and the purse pays your multiplier on the stake, never on a running pot. On the line or below, Blackjaw takes it. One shake in twenty a twenty-sided kraken die tumbles up first and lands on ×2, ×3, ×5 or ×10: it multiplies a win and changes nothing else, and the ladder is scaled so the game returns 99% whether it fires or not.
Set Your Line
Every total from 5 to 30, each bar as tall as it is likely: 7,776 rolls, counted. Green is yours, red is Blackjaw's. Here the line is OVER 17, a 50% chance at ×1.79, and the SHAKE button reads the stake, the line and the multiplier before the press.
One Press
The cup shakes, tips, and five dice pour out across the deck. The round is settled before the cup moves; what plays is the total on its way down.
Branded Into The Planks
Twenty-one, green: above the line, and the caption under it reads what the cup paid, 17.87 on a 10.00 stake at ×1.79. The dice settle in a ring around the figure and never on it.
On The Line Or Below
Thirteen, red. The stake is his, and the board says so in one line. A loss costs the stake and nothing more: there is no pot to lose.
One Shake In Twenty
The deck shakes and the board goes dark before the cup is even lifted. A twenty-sided die tumbles up out of the planks: ten faces of ×2, six of ×3, three of ×5 and one ×10.
The Badge Rides The Round
The face docks in the corner and the total carries it: 21 at ×3, and the caption is exactly what the cup paid, 53.63 on a 10.00 stake. The kraken multiplies a win and never changes the dice or what wins.
Check The Math Yourself.
Every round is committed before it opens and verifiable after it ends. Operators do not have to take our word for it, and neither do their players.
COMMIT
Before a round opens, the server publishes sha256(server_seed). That hash pins the crash point in place before the first bet is taken.
PLAY
The round runs. crash_at derives from HMAC-SHA256(server_seed, client_seed:nonce), so neither side can steer the outcome mid-round.
REVEAL
After the bust, the server reveals server_seed. Anyone can rehash it, recompute crash_at, and confirm both match the record.
THE REFERENCE VERIFIER AND FULL DERIVATION SHIP WITH THE INTEGRATION DOCS.
$ rara verify --game deadmanscup --round 001042 # hash published before bets opened server_seed_hash sha256:9f2c71a84be…c30be81a client_seed deadmanscup-demo-7f3a nonce 001042 hmac = HMAC_SHA256(server_seed, client_seed + ":" + nonce) = 7c2e4d09aa61b8e2…10f4b90f h = int(hmac[0:8], 16) crash_at = max(1.00, floor(99 * 2^32 / (h + 1)) / 100) = 3.47x $ rara reveal --game deadmanscup --round 001042 server_seed 4b7dd21c09aae5…f133c2e9 sha256(server_seed) == server_seed_hash ok recompute(crash_at) == 3.47x ok verify == true
The Math Ships With The Game.
RaRa Studio is an independent game studio in Tbilisi, Georgia. Every title starts as a model: simulated, stress-tested, and documented before the art goes in. Spec sheets and verifiers are part of the product, and Vice Run is the first title through the pipeline.
Put DEAD MAN'S CUP On Your Platform.
Integration docs, the full math spec, and playable builds are available under NDA to operators, aggregators, and platforms.