An ancient adventure with a modern collecting element – Book of 99 combines myth and mechanics into a precise, fast slot experience.

Mood and theme

Book of 99 leans on Greek-inspired imagery: heroes, mythical creatures and the titular book, which acts as both Wild and trigger. The graphics are detailed, the music unobtrusive and it gives the game a calm, determined tone – not pathos, but a clear gameplay mechanic in the foreground.

What the gameplay promises

The core idea is simple and transparent: you collect book symbols during the base game, fill a counter and trigger the free spins feature when 99 books have been collected. In the free spins a special expanding symbol is randomly selected, which pays on all 10 paylines — even when the symbols are not connected from left to right.

• Collection mechanic: 99 books trigger 10 free spins
• Special expander: one symbol expands in the free spins and pays on all lines
• Simple grid: 5x3 with 10 fixed paylines – straightforward for new players
• High win potential: potential up to several thousand times the bet

Why play?

Book of 99 is aimed at players who like clear rules and visible progression: you can always see how close you are to the free spins, and the expanding symbols in the free spins create more intense win opportunities without false promises.