Developer 
Features Book of Fusion by SG Digital is a 5-reel slot with 10 paylines, medium-high volatility and RTP settings listed at 89.99%, 93.98% and 95.97%. The game uses a minimum bet of 0.1 and a maximum stake of 35, with a top prize of 250,000.
The main feature is the bonus round, where 2 special symbols are randomly selected to act as expanding symbols when they appear in a winning combination. Free spins can be retriggered without a stated limit, and each retrigger selects another 2 special symbols to expand. The game also uses a Book-style theme built around Fusion symbols and a standard slot structure.
A demo version is available near the game launcher, allowing players to play for free and practice before playing for real money. This makes it possible to review the payline setup, volatility profile and bonus mechanics before choosing a stake.
