#2897 of 7,053 games by turnover, last 30 days · #1206 of 2,086 new releases
RTP 96%
Max win 50,000x
Std deviation 37.6
Released 21 Oct 2026
Play money, no account. 18+
Last 30 days
Complete UTC days · Engine Insights
$11.61KWagered
18.8KBets
350Player accounts#1845 by players
$0.62Average bet#4984 by average bet
21 OctWagered per UTC day6 Nov
Player accounts count one account on one casino, so a person on two casinos counts twice. Figures: Engine Insights (full page on Engine).
Mainspring Heist RTP, max win and bonus buys
Official figures · version 2
96%RTP · base game
50,000xMax win
1 in 2.7Plays that win something
1 in 2MMax win odds · base game
Mode
Type
Cost
RTP
Max win
Extra Chance
Bet boost
3x the bet
96%
50,000x
Feature Normal
Bonus buy
100x the bet
96%
50,000x
Feature Super
Bonus buy
250x the bet
96%
50,000x
Feature Mystery
Bonus buy
445x the bet
96%
50,000x
From engine.io's public provably-fair tool, for the game's current version (checked 28 Oct 2026). RTP is the long-run average return; real sessions vary widely. Max win is in multiples of the bet. 18+, play responsibly.
Quick answers
What is the RTP of Mainspring Heist?
Mainspring Heist by concrete has an RTP of 96%.
What is the max win in Mainspring Heist?
The maximum win is 50,000x the bet.
Does Mainspring Heist have a bonus buy?
Yes: Feature Normal costs 100x the bet, Feature Super costs 250x the bet, Feature Mystery costs 445x the bet.
When was Mainspring Heist released?
Mainspring Heist was released on 21 Oct 2026.
Where can I play Mainspring Heist?
Mainspring Heist is on Stake. Casino links may be affiliate links. 18+.
Leaderboard placings
Calendar leaderboard placings
Calendar
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Since launch leaderboard placings
Since launch
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Turnover
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24h after launch
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From Engine's public leaderboards: yesterday, this week, this month, the last 30 days and all time, plus each game's first day, week and month since launch. A dash means the game is outside that board. Average bet is turnover ÷ bets.
