

Proton’s a compatibility layer to translate between games that want to speak to windows and a Linux system. Steam downloads it for you if you turn it on as a setting, and most of the time you shouldn’t have to worry about it past that.
For pirated games: if you have the game as a folder with a game exe rather than an installer, you can still add it to steam pretty easily as a non-steam game and then just enable proton. If it has an installer this can still work, but it’s more of a pain cuz you have to add the installer to steam, run it with proton, and then switch the steam entry’s file location to the newly installed game. I honestly don’t recommend doing it that second way, I’m chronically allergic to bloat (arch btw) and even for me this is a dumb hacky work around.
With the old parts swapped out of the ship Theseus is currently using?