If you're trying to work out whether Book of Bloodlines is worth your time, this hands-on review breaks it down. Developed by Air Dice, Book of Bloodlines arrives with medium high volatility and 95.39% RTP. It first went live in 2024 and still earns its place today. Visually it's leaning into a halloween and book of aesthetic, with the action running on a 5-reel grid running 15 paylines. If everything lines up, Book of Bloodlines can pay up to 5,000x your bet. Here's how it stacks up.
Written by Sophie Williams · Last updated: January 2026
Book of Bloodlines is a slot game from Air Dice, built around a halloween and book of theme. It runs on 5 reels and 15 paylines with a medium high volatility profile, and a published RTP of 95.39%.
Dig into the bonuses and Book of Bloodlines starts to stand out. Look out for scatter symbols that unlock free spins and extra bonus rounds. The medium high volatility strikes a middle ground that should suit most playing styles. All told, it's a solid entry in the Air Dice catalogue.
At 95.39%, 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.
Medium-high volatility means wins come less frequently but tend to be larger when they hit. Players should be prepared for dry spells between bigger wins, requiring a moderate bankroll.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Book of Bloodlines 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 Bloodlines by Air Dice is a solid offering that delivers good entertainment value. The 95.39% RTP combined with medium high volatility creates a well-balanced gaming experience.