How to improve your girlfriendship using video games

Greetins gamers from across the lands of internet, i got a dilema i need some help with. there's this girl that i want to play games with co-op or just normal multiplayer, no matter as long as we can have fun and after Portal 2, i ran out of ideeas (portal was the only one). Comon, fill me up with your oppinions! .....Please :)

World of Warcraft. Get it.

It's not co-op but every girl I know LOVES Dragon Age: Origins.

Rock Band and Nintendo party games (Mario Kart, Super Smash Brothers, etc) are big ones. In high school a lot of girls would play Halo with their boyfriends.

World of Warcraft can be kind of a hit or miss. I've known a lot of girls that don't normally play games get hooked to it, others get turned off by the amount of depth in RPGs.

Me and my girl play Guild Wars and Diablo 2 together. We are both excited for Diablo 3. Maybe you can play The Sims 3 with her. Part of the problem is finding games she likes. When it comes to this, that's what matters, not what you like.