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RTP
96.11%
Max win
25,000×
Ways to play
6
Max-win odds
1 in 10k
MONSTER LAB is a Mask On Gaming slot on Stake Engine with 96.11% RTP and a 25,000× max win. Play the MONSTER LAB demo free above with play money — no deposit and no account needed. It has 6 ways to play, from the base game up to super bonus at 250× your bet, and each one's exact odds are broken down below. For real money, MONSTER LAB is available at Stake.
Every way to play
6 modes · tap one to explore its odds
Cheapest route to the 25,000× max: Injection Spin (50×) — about 500k× your bet staked per hit on average, vs 3.6M× on super bonus (250×).
Base game
Base game · 1× your bet per spin · A normal spin at 1× your bet.
RTP
96.11%
Max win
25,000×
In profit
2.2%
Pays nothing
74.5%
Odds explorer
Pick a payout and read the exact chance, straight from Engine's provably-fair outcome table.
Reading the outcome tables…
Demos use play money. Maths computed by circus.fyi from Engine's published provably-fair tables — every outcome a mode can produce and how often, nothing sampled.
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MONSTER LAB demo — questions
- Can I play the MONSTER LAB demo for free?
- Yes. The MONSTER LAB demo on circus.fyi runs the real game from Stake Engine with play money, so you can try every feature without a deposit or an account.
- What is the RTP of MONSTER LAB?
- MONSTER LAB has an RTP of 96.11%, which means it pays back that share of every amount staked over the long run.
- What is the max win on MONSTER LAB?
- The max win on MONSTER LAB is 25,000× your bet. The most likely way to land it is Injection Spin (50× per round), where it hits about 1 in 10,000 rounds.
- Does MONSTER LAB have a bonus buy?
- Yes — MONSTER LAB has 4 buy options: Bonus buy at 100× your bet; Super Bonus at 250× your bet; Superchance at 15× your bet; Injection Spin at 50× your bet.
- How often does MONSTER LAB pay?
- In the base game, 2.2% of spins pay back more than they cost and 74.5% pay nothing. These figures come from the full outcome table, not a simulation.
- Who makes MONSTER LAB?
- MONSTER LAB is made by Mask On Gaming and was released on Sep 17, 2026. It is published on Stake Engine, so its outcome tables are provably fair.
- Where can I play MONSTER LAB for real money?
- MONSTER LAB is available for real money at Stake. Use the "Play at" button on this page to open it at the casino you prefer.