Steam

Steam runs natively on Linux. You can probably just install it from your App store.

Usually you want to use Steam (Runtime). Only use Steam (native) if you know why you want to use it.

Enable Steam Play for all games

In order to run games that are not explicitly whitelisted by Valve, go to Steam -> Settings -> Steam Play and check "Enable Steam Play for all other titles" and then select "Proton Experimental" in the drop down menu.

If something doesn't work, check out Proton-GE.

ProtonUp-Qt

You can use ProtonUp-Qt to make the installation and update process of Proton-GE simple:

• 1. Download the ProtonUp-Qt AppImage
• 2. Mark the AppImage as executable
• 3. Double-click the AppImage to run ProtonUp-Qt

Launch Options

You may find something like -screen-width 1280 -screen-height 720 -screen-fullscreen 0 on protondb. These are launch options.

To use them, you right click on the game, and in the general tab, there is a field called launch options. You paste them (for example -screen-height 1920 -screen-width 1080 -screen-fullscreen) in there.

Steam Tinker Launch

Steam Tinker Launch is a swiss army knife tool that allows easy customization of multiple options for Steam games. It is very feature rich, so for a (almost) complete list of features check the comprehensive wiki (dropdownlist on the right). To name a few you can override/append/prepend custom commands, automatically use Vortex or Mod Organizer 2, (auto-) download/update Proton GE, apply multiple Proton/DXVK/wine options, use winetricks, automatic ReShade installer per game including easy shader selector, FSR support, debugger support, side-by-side VR automation, SteamGridDB support, SpecialK, Proton KillSwitch, Gamescope, GameMode, many many more...