Book of 99 Slot Machine

Book of 99 is also visually appealing, albeit perhaps not as much in the regular game as in the bonus game, which takes place in a sun-drenched, easy-on-the-eyes arcadia. The rest of the game has a distinct Relax feel. The Greco action takes place on a classic 'book of' reel set with five reels and ten fixed paylines. Beginning with reel 1, winning combinations are produced when matching symbols appear adjacent to each other on a payline. In this Greek odyssey, you'll find a group of gorgeous 10-A symbols at the lower end of the spectrum, as well as higher-paying symbols such as a monster named Lamia, a cyclops, and female and male lead characters.  Low pays require at least three to form a winning combination, and high pays give out coins for two or more. If a line of five premium symbols appears, players can win between 75 and 500 times their investment, making full screen winnings more exciting.

The main feature is expanding symbols during free spins, but Relax Gaming has also included a collection system, which is unusual in these types of games.

As always, the book sign is required to unlock the game's most exciting moments. It is wild, substituting pay symbols to complete win lines, and the scatter - three or more in view awards ten free spins but no side reward, which is unique. Before the free spins begin, one of the pay symbols is randomly selected to serve as the unique expanding symbol for the duration of the bonus. 

Following any ordinary wins, special symbols grow to cover all spots on their respective reels. Expanded symbols pay all-ways from any reel, thus they don't have to be close to each other or on reel 1. Full-screen wins are the ultimate goal here; the more valuable the symbol, the better. One final note regarding free spins: they are retriggered when three or more book symbols land. Every wild symbol landed in the main game boosts the collecting metre on the side of the screen by one step. Filling the metre with 99 collected wilds will result in 10 free spins. Triggering the bonus round in this manner follows the same principles, so the all-important expanding symbols come into play.