rtp slotThe RTP of the slot machine will then be calculated according to the casino’s wagering requirements. So as long as you clear a bonus you will enjoy the specified RTP instead of the theoretical RTP without bonus. So this is2. Book of 99: 99% RTP . Released by Relax Gaming in May 2021, Book of 99 is a 5 reel, 10 pay slot game with a 99% RTP rate. With an ancient Greek theme, you can spin away on