Thunder Book is a AMBERTUSK STUDIOS slot on Stake Engine with 96.50% RTP and a 25,000× max win. Play the Thunder Book demo free above with play money — no deposit and no account needed. It has 4 ways to play, from the base game up to super bonus at 500× your bet, and each one's exact odds are broken down below. For real money, Thunder Book is available at Stake.
Every way to play
4 modes · tap one to explore its odds
Cheapest route to the 25,000× max: Super bonus (500×) — about 6.3M× your bet staked per hit on average, vs 316M× on standard (100×).
Base game
Base game · 1× your bet per spin · A normal spin at 1× your bet.
Odds explorer
Pick a payout and read the exact chance, straight from Engine's provably-fair outcome table.
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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Thunder Book demo — questions
- Can I play the Thunder Book demo for free?
- Yes. The Thunder Book 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 Thunder Book?
- Thunder Book has an RTP of 96.50%, which means it pays back that share of every amount staked over the long run.
- What is the max win on Thunder Book?
- The max win on Thunder Book is 25,000× your bet. The most likely way to land it is Super bonus (500× per round), where it hits about 1 in 12,504 rounds.
- Does Thunder Book have a bonus buy?
- Yes — Thunder Book has 3 buy options: Standard at 100× your bet; Golden at 200× your bet; Super bonus at 500× your bet.
- How often does Thunder Book pay?
- In the base game, 10.3% of spins pay back more than they cost and 66.6% pay nothing. These figures come from the full outcome table, not a simulation.
- Who makes Thunder Book?
- Thunder Book is made by AMBERTUSK STUDIOS and was released on Oct 9, 2026. It is published on Stake Engine, so its outcome tables are provably fair.
- Where can I play Thunder Book for real money?
- Thunder Book is available for real money at Stake. Use the "Play at" button on this page to open it at the casino you prefer.