There are a lot of DRM-free games on Steam. You have to log in to download them in the first place obviously (they haven’t figured out how to make downloads magic yet unfortunately) but once they’re downloaded you can just launch the executable however you want.
Any game on Steam that has DRM has DRM because the publisher wants it that way.

In my ideal world Geoff was chosen by lottery, he does not want to do it, but he surprises everyone by not absolutely eating shit and finishes cleanly.