Slot games, on the one hand, are essentially based on chance; random number generators (RNGs) decide the results, making every spin distinct and unpredictable. Because of thislots ace 777s randomness, no amount of strategy or skill can ensure a win on any particular spin. Components of Skill in Big Winner Slot Machine Play. It is possible for players to be at the mercy of chance when it comes to triggering bonus features or hitting winning combinations. To play Big Winner Slots successfully, though, you need to have some skill.