Every spin of every slot machine is independent and unpredictable because they are all controlled by random number generators (RNGs). Because of this unpredictability, there is no surgames slotsefire method to win; nevertheless, knowledge of return-to-player (RTP) percentages can offer insight into future payout possibilities. RTP is the percentage of money wagered that a slot machine is designed to give back to players over a long period of time. A slot machine with a 95 percent RTP, for example, should theoretically pay out $95 for every $100 wagered.