Comment by astrobe_

Thanks. Personally, I simply refuse to install games with anti-cheats, be it on Linux or on Windows. This mostly leaves me with FOSS games and small communities. For instance, Zero-K. Zero-K is curiously fine for large team games - you will usually find players to play with anytime - but if you are looking for PvP you have to be there when the right players are usually online. Being there and available for a game can be a way to contribute to a FOSS project too.

In some cases there are numerous public servers, which can mitigate the "player availability" problem.

Also, for these online FOSS games the servers are community-owned and moderated. Cheaters, trolls, inappropriate chats are monitored by someone who is interested in, and generally quite knowledgeable about, the game.