PC gamer have a quirky article about how to keep playing your precious PC games in a Fallout world.
http://www.pcgamer.com/how-to-keep-playing-pc-games-in-the-post-apocalypse/

But True to form, the Gaben worshipping zealots ignore the basic fact that 90% of games that need such powerful hardware are Locked to Steam and Unplayable.

Yeah, omitting DRM for such scenario sounded odd.

But that was fortunately pointed out in the comments section, and even GOG mentioned there.

Maybe it was removing DRM that caused the Fall of Man

Hopefully mobile games don't survive into that period.