Each game is created with unique bonuses and rewards linked to its scatter symbols. The paytable always outlines this for a specific game. The common feature scatters unlock is multiple free spins. If you choose games where free spins can be triggered, this increases your winning potential. Aside from free spins, there could also be bonus games. Sometimes, they come in the form of a separate game-in-game feature, while in other slots, they come in the way of a spin-the-wheel feature or a set of cards against the dealer.