

If you’re not just being facetious, https://areweanticheatyet.com/ is a good source.
According to them ~58% of anti-cheat games work. There’s been a large uptick of anti-cheat support since the Steam Deck.
According to ProtonDB, 86% of the top 1000 games on Steam function (Silver+ rating). It’s a pretty safe bet that the most of the missing 14% is probably due to anti-cheat.
Is it Hell Let Loose? I started playing it since they support Linux now, very well done Battlefield-like game. I haven’t played much BF since 1942.