I love this community, got so many recomendations I decided to update the first post! Sorry if I couldn't reply to everyone, Jerboa almost exploded, haha. But I'll upvote all your contributions now that I'm on PC.
Original post
I like to play on the same computer with my bf, and recently we've started to get tired of MAME since we've been playing our faves on repeat for so long.
The other game we play is Spelunky, since is the only local co-op game I have on Steam. I ask because Steam summer sales are close and I can give him a surprise :D
I'd recommend LEGO City Undercover as well. Imagine LEGO GTA and you've pretty much got the gist. Very fun playing with my wife on the Switch, but I'm sure it's got a much better framerate on PC.