Many single player games work out of the box in Steam, because they’ve invested a huge amount of effort into Proton (their compatibility layer).

Here are some games that have worked pretty well out of the box:

- Factorio

- Arc: Raiders

- Overwatch

- Age of Empires 2 DE

- Abiotic Factor

- Subnautica 2

- Windblown

- Dune Awakening

- Cybperpunk 2077

- Star Citizen (with the community installer to help set it up)

See here for a database: https://www.protondb.com/

The main asterisk is that if you use newer GPUs, you’ll need to use a newer kernel / drivers to get solid support (which is why Arch (& CachyOS) is a popular gaming distro). And certain technologies may not be supported for a while, or take some time to set up (ray tracing, DLSS, frame gen type stuff etc.)

Performance is comparable to windows, and sometimes better because windows is a bloated piece of shit. Lol.

A lot of stuff you can try and it works ok, but the main things that are permanently unsupported are kernel-level anti-cheat (like Valorant) or online games with anticheat that will detect something weird in the setup and ban you. But some competitive games work fine (like overwatch)