Welcome to our deep dive on Book of Mystery Pyramids — the demo, the maths, and whether it earns a spot in your rotation. Onlyplay are the studio behind it, tuning the title for a high volatility profile, with 95.8% RTP. You get 5 reels and 10 paylines, all themed around book of and egyptian. The maximum win sits at 5,000x, so there's serious upside on the table. So does it deliver? Let's get into it.
Written by Sophie Williams · Last updated: January 2026
At its core, Book of Mystery Pyramids is a release produced by Onlyplay, built around a book of and egyptian theme and powered by a 5-reel grid running 10 paylines. The result is high volatility paired with an RTP of 95.8%.
Where Book of Mystery Pyramids earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. With high variance, this one is aimed at players who can ride out the swings for the top wins. Overall it's a well-rounded release that knows what it is.
At 95.8%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
High volatility means longer gaps between wins, but when wins do land, they can be significantly larger. A bigger bankroll and patience are recommended for this type of slot.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Book of Mystery Pyramids features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.0 / 5 — Good
Book of Mystery Pyramids by Onlyplay is a solid offering that delivers good entertainment value. The 95.8% RTP combined with high volatility creates a well-balanced gaming experience.