In Gates of Olympus, there are cascades, free spins, and an Ante Bet feature. The cascades award multipliers of 2x to 500x your bet, and the free spins can be triggered by landing 3 or more scatters anywhere on the reels. If you use the Ante Bet feature and invest 25x, your chances of free spins double by landing additional scatters on the reels on the next spin.