Well said. You hit the nail on the head with the problem of “cheaters” in any real world application of Rawl’s philosophy. One of the interesting things about games, at least our modern video versions, is that “actual” cheating has become quite difficult. I’m contrasting actual cheating with game cheats that are either purposely programmed into the game and advertised as such and/or game cheats that players discover on their own. “Actual” cheating I define weakly as cheating with the intent to disadvantage competitors and meant to be hidden from other players. To cheat in modern competitive gaming requires an immense amount of technical skill and subterfuge. That said from what I have read it is widely believed that cheating/hacking is prevalent in many competitive gaming circuits. However it’s not clear that the belief in widespread cheating is supported by the reality.
I think most people would agree that the opportunities for cheaters/cheating in the real world are much greater and the barriers to entry much lower compared to cheating in competitive gaming. In a sense one could argue that games are more fair/just then the real world. Without cheaters Rawl’s approach to Justice as fairness and his political philosophy in general becomes a little more tenable.