Book of Time has been catching plenty of attention, so we put it through its paces to see how it really holds up. Built by Hacksaw Gaming, it lands as a slot with a very high-variance maths model and a published RTP of 94.01%. Top wins are capped at 50,000x your stake, a genuinely massive ceiling for the patient. It first went live in 2022 and still earns its place today. You get 5 reels and 40 paylines, all themed around book of. Here's how it stacks up.
Written by Sarah Mitchell · Last updated: January 2026
Book of Time is a game from Hacksaw Gaming, leaning into a book of aesthetic. It runs on 5 reels and 40 paylines with a very high-variance maths model, and a published RTP of 94.01%.
Dig into the bonuses and Book of Time starts to stand out. Look out for scatter symbols that unlock free spins and extra bonus rounds. With very high variance, this one is aimed at players who can ride out the swings for the top wins. All told, it's a serviceable entry in the Hacksaw Gaming catalogue.
The RTP of 94.01% is below the industry average of ~96%. This is common for older slots or those with special features. The lower RTP may be offset by unique mechanics or higher maximum win potential.
Very high volatility delivers the most extreme payout profile — long dry spells punctuated by potentially massive wins. Only recommended for experienced players with substantial bankrolls and high risk tolerance.
At approximately 1 in 10 spins, wins are infrequent. However, when wins do occur, they tend to be considerably larger to compensate.
Book of Time 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.
0.5 / 5 — Below Average
Book of Time by Hacksaw Gaming provides a straightforward slot experience. While it may not break new ground, it offers very high volatility gameplay that will appeal to certain player preferences.