As it’s one of the most recognizable games from casinos around the world, it’s no wonder that Book of Ra has an immensely popular online counterpart. This classic by provider Greentube takes you to Egypt, where you join the quest of the riches underneath the ancient temples. There are 5 reels with 3 symbols each, and between 1 and 10 paylines that you can set yourself, plus a gamble feature.