Book of Time is a 5-reel, 4-row video slot developed by Hacksaw Gaming, a provider known for pushing inventive mechanics into visually distinctive packages. The game runs on 20 paylines and carries a high volatility rating, which shapes the overall risk profile players should expect going in.
Gameplay & Mechanics
The grid structure — five reels across four rows — gives Book of Time a slightly wider playing field than many traditional slots. With a hit frequency of 16.35%, winning combinations land less than once in every five spins on average, which is consistent with the high-volatility classification. Sessions are likely to include extended dry runs punctuated by less frequent but larger returns. The math model targets a max win of 10,000x the bet, placing it firmly in the upper range for Hacksaw Gaming's catalog. Hacksaw has built a reputation for tight game design and well-tuned math models, and Book of Time reflects that approach.
Bonus Features
Book of Time incorporates expanding symbols and wild multipliers as its primary bonus mechanics. Expanding symbols are a staple of book-style slots, and here they activate during the free spins round to cover entire reels, significantly increasing the coverage of any given symbol on the grid. Wild multipliers layer additional value onto winning combinations during bonus play, and together these two mechanics drive the bulk of the game's win potential. The interaction between expanded symbols and multiplier wilds is where the 10,000x ceiling becomes theoretically reachable, though high-volatility math means the top end is rare by design.
Should you play it?
Book of Time suits players who are comfortable with infrequent wins and a longer variance curve. The 16.35% hit frequency means bankroll management matters more here than in medium or low-volatility titles. Without a confirmed RTP figure in our verified data at this time, players are advised to check the in-game paytable or casino lobby for the specific RTP variant being served, as Hacksaw Gaming titles are known to appear in multiple RTP configurations across different operators. The 10,000x max win and Hacksaw's track record for well-structured bonus rounds make Book of Time a technically credible option for high-volatility slot players.