Yutram and I tested the new Steam couch co-op feature recently released by Steam. It allows you to play a local co-op game with a friend (assuming the game is supported). The nice thing about this new feature is the ability to play with a friend who doesn’t own the game, and since it’s your computer they’re connected to they’ll see your nightmarish mods:
I’ll have to progress through my library and see what works and what doesn’t, even keep my eyes peeled for some local co-op games in the upcoming sale. I like where this is going!