My other half isn't much of a gamer but she has my old low end laptop and wants a co-op game that we can play together. We've previously played Minecraft together but nothing else, she just wants something we can play together.
Any good recommendations that are cheap and not graphic intensive?
I'll second PlateUp. Brought it up when I was visiting my brother and his wife, and we ended up spending like 15 hours on 4-player coop that week.