The answer is straightforward: the one that has the maximum possible return to the player. Good choices will be titles of 96% RTP or above. We don’t advise you to opt for slot machines with RTP below 95%. Such pokies pay frankly poorly, so try to avoid them. Game developers set the RTP when creating slots: this value is fixed in the software. Thus, casino operators can’t arbitrarily change the percentage at their own will.