How do you calculate RTP? The RTP of the games are determined using a mix of mathematical analysis and game simulations. The results of this are used to establish the average return percentage that you see displayed on the games as the RTP. Independent specialists also verify the games in testing.We also make the results available to external auditors and regulators as part of our commitment to game fairness. If you need any further assistance, please see our contact details here. Related articles Where can I find the RTP for a game? What is Return to Player (RTP)? Game Fairness Do more win lines increase my chances of winning? Playing slots