Use Proton 3.16-9 or the game won't launch. Launching the game through Steam isn't the only way to play the game. Maybe I just didn't notice anything, but I don't think the Steam version has any DRM. It even had stuff from the GOG version. This is great if you want to run this game on a DOS system or some other device.

The game comes bundled with minimal DOSBox, but it's just an executable. I'm experiencing ways I can replace the DOSBox exe with the Linux DOSBox package. I'm also trying to make a Lutris version, so depending on when you read this, it might already exist.