Book of Luck
96.7%
RTP
20,000x
Max Win
Bonus buy options
- Extra Chance2x bet
- Regular Bonus100x bet
- Lucky Spins100x bet
- Super Bonus200x bet
- Mystery Bonus250x bet
- Min Bet
- 0.1
- Max Bet
- 1000
- Release Date
- August 2, 2026
A Stake Engine title, so there is no maker demo to embed here. On Stake it can be played without an account as Demo (Fun Play).
About this Slot
Book of Luck is a fantasy-themed slot from Knockout Labs with an RTP of 96.7%, medium volatility and a maximum win of 20,000x. The game features expanding symbols, which are chosen randomly before each feature begins. High-value symbols expand when two matching reels land them, while low-value symbols expand from three matching reels. A feature multiplier applies randomly to the full spin win during play.
Landing three scatter symbols opens the Retrigger Wheel, which awards additional free spins and adds a new multiplier to any existing multiplier from the feature.
The Bonus Wheel selects both a random symbol and a random multiplier to apply during the bonus round.
Extra Chance costs 2x the bet and increases the likelihood of landing scatter symbols. Regular Bonus costs 100x the bet and grants 10 free spins, with the bonus wheel picking a random symbol and random global multiplier. Lucky Spins costs 100x the bet, picks a random expanding symbol and random global multiplier from the following values: 2x, 3x, 5x, 7x, 10x, 15x, 20x, 25x, 50x and 100x.
Super Bonus costs 200x the bet and starts with 10 free spins, with the wheel choosing a random premium symbol. Mystery Bonus costs 250x the bet, reveals its hidden outcome before play begins, awards 10 free spins and picks both a random expanding symbol and random global multiplier.
Book of Luck Community RTP
Real RTP estimated from rounds contributed by the community, across all uploaders.
No measurements for this slot yet.
Your archive would be the first.
Book of Luck RTP Calculator
Book of Luck has a theoretical RTP of 96.7%. Its volatility is Medium, so expect a balanced mix of dry spells and mid-size hits. Its win potential is capped at 20,000x your stake. Use the calculator below to estimate your expected return, variance range and risk of ruin over any number of spins.
Book of Luck Variance Simulator
Book of Luck sessions can swing far from its 96.7% average - its volatility is rated Medium. The simulator runs many virtual bankroll runs to estimate the bust rate, typical drawdown and best/worst outcomes over a set number of spins - compare a cautious bankroll against an aggressive one.
All Wins
No wins on this slot yet.
Play on Stake*Frequently asked questions about Book of Luck
An RTP of 96.7% means Book of Luck is built to pay back around 96.7 for every 100 wagered over millions of spins. Any single session can land far above or below that - use the RTP calculator on this page to model your own bet size and spin count.
Over the long run Book of Luck's house edge is about 3.3% of everything you wager - roughly 3.3 lost per 100 staked. Short sessions vary widely; the calculator above shows the expected loss and variance range for your inputs.
Quite a lot. Because wins cluster around rare big hits, your balance can move far from the 96.7% average in either direction. The variance simulator above shows typical drawdowns, bust rate and best/worst outcomes for your bankroll.
It depends on your bet size and how long you want to play Book of Luck. Use the variance simulator above to test a cautious versus an aggressive bankroll and see how often each survives your target number of spins.
