Curious what Book of Skull actually feels like to play? Here's our full, no-fluff take. Built by KA Gaming, it lands as a release with a medium low-variance maths model and an RTP of 96.61%. Visually it's themed around halloween and book of, with the action running on a 5-reel grid running 25 paylines. Top wins are capped at 5,000x your stake, a healthy ceiling worth chasing. Originally released in 2024, it has aged well. The full verdict is below.
Written by Sophie Williams · Last updated: February 2026
This slot game, Book of Skull, is the work of KA Gaming. Presentation-wise it's leaning into a halloween and book of aesthetic, and it leans toward a medium low-variance maths model at 96.61% RTP. Under the hood you'll find 5 reels and 25 paylines.
Dig into the bonuses and Book of Skull starts to stand out. Look out for scatter symbols that unlock free spins and extra bonus rounds. Thanks to its medium low variance, wins come often enough to suit casual, lower-risk play. On balance, Book of Skull is a dependable option worth a few spins in the demo first.
With an RTP of 96.61%, this slot sits above the industry average of ~96%. Players can expect a solid return over extended play sessions, making it a good choice for value-conscious players.
Medium-low volatility offers a good balance of regular wins with occasional larger payouts. Expect frequent hits with modest amounts, suitable for casual players who want low-risk entertainment.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Book of Skull 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 Skull by KA Gaming is a solid offering that delivers good entertainment value. The 96.61% RTP combined with medium low volatility creates a well-balanced gaming experience.