Linux is only a temporary panacea at best.

Given Valve’s failures with AAA multiplayer games rejecting Linux due to the ease of undetectable cheating that unsecured Linux presents, once Steam Linux gains enough market foothold they’ll be able to ship attested secure boot for Linux; at which point games will start opting in to require you to be booting Valve’s anti-cheat Linux that requires TPM 2.0 to deny you kernel modding, debugging other processes, and so on. This is why Windows 11, specific enterprise versions of Windows 10, and any Apple operating system released since the T2 chip all require a TPM: preventing users with admin rights from patching kernel space stops cheating and malware, and is a ten-year lead held by Apple and Xbox over PCs and Steam Deck.

It would be deeply ironic if they licensed Microsoft’s Xbox Proton TPM, which AMD ships Windows 11 drivers for, to a new Steam Deck that support dual secure-booting attested Windows 11 and attested Linux :)

I'd personally avoid such games.

And I think it's a cat-and-mouse battle the anti-cheat folks are doomed to lose. If you have good reverse engineering chops, it seems like it would be fairly trivial to patch the "Am I running on a TPM?" check out of a game binary.