Knowing Return-to-Player (RTP) Ratios. There are tactics players can use to increase their chances of winning, even though slot machines are essentially games of576 slots download chance. Selecting machines with higher return-to-player (RTP) percentages is one of the best strategies. A theoretical indicator of how much money a machine will eventually return to players is called RTP. For example, over time, a slot machine with a 95 percent RTP should yield a payout of $95 for every $100 wagered.