Cops or robbers.The player decides.

A 5×3 video slot where the same bonus plays out two opposite ways: wilds that stay locked, or a multiplier that never stops climbing. Ready to play in the browser.

Vault Standoff base game
96.34%
RTP
32.42%
winning spins
5,000×
max win
1 in 77
spins with a feature
Medium
volatility, SD 6.61×
5×3
20 fixed lines

The standoff at the vault

Three or more Vaults start the free spins, and the player picks a side. Same average win, two very different rides.

Robbers

9 free spins

Every Robber Wild stays locked on the reels until the end. When a guard lands, it arrests a random robber.

Fewer spins, bigger hits. 96.70% RTP always playing Robbers.

Robbers free spins with locked wilds

Cops

11 free spins

Every Cop Wild adds +1 to the multiplier, and the multiplier never goes back down.

Steady build-up: it ends at ×9 on average. 95.97% RTP always playing Cops.

Cops free spins with a ×4 multiplier

The rest of the heist

The Empty the Vault bonus

Empty the Vault

Hold & win with 3 respins, triggered on average once every 233 spins. Respins can land Mini 20×, Minor 50× and Major 250× jackpots; fill all 15 cells for the 2,000× Grand.

The safe deposit boxes

Safe deposit boxes

Twelve boxes opened one at a time: loot, a doubler, a bribe that buys off the next guard. Contents are fixed when the bonus starts.

The count-up for a 25× win

Win count-up

Every win of 10× the bet or more opens a full-screen counter with win tiers lighting up in euros. On bought bonuses the reference is the price paid.

The base game also features the Tip-off (2–5 wilds on reels 2–5, 1 in 145 spins) and Reinforcements (reels filled with Cop Wilds, 1 in 125). Four bonus buys from 12× to 134× the bet and a Cop-or-Robber double-up complete the game.

For providers and operators

Math

  • RTP calculated exactly and confirmed with a 60-million-spin simulation on the production engine
  • Full PAR sheet, win distribution and the frequency of every feature
  • Math engine separated from the UI, with a seeded RNG for repeatable tests

Integration

  • Single-file HTML5, desktop and mobile, no external dependencies
  • Automated engine and UI tests, technical documentation
  • Deals: rights assignment, licensing or a mixed deal

Market profiles

Sensitive features switch on or off per market. In the demo, try them from the Mercato menu.

ProfileBonus buyDouble-upTurbo and autoplayWins ≤ stakeMinimum spin
All featuresyesyesyeswith sound
No buy, no double-upnonoyeswith sound
Restrictive (UK-style)nononono celebration2.5 s

Let's talk

Write to me to book a call where I walk through the game and its math, or to receive the PAR sheet and technical documentation.

samuel@vaultstandoff.com