[Draiken]

Most game studios pay someone else to make the anti-cheats and many already have Linux versions that the studios choose to not enable.

Besides, if your anti-cheat only ever looks at the system level, it'll easily be bypassed by hardware cheats. At some point I think anti-cheats will have to "know" the game to be able to detect anomalies. It's the only way to effectively stop many categories of cheats.

[int_19h]

Those Linux versions are generally not kernel-level. Do you know of any that are?

And yes, of course it's not fool-proof. It's not supposed to be. It's about probabilities: for a given online game, what is the chance that I end up in a match with someone who is obviously cheating and using that to ruin the game for everyone else? The harder you make cheating, the lower that is.