So, my girl and I recently decided to take a break on WoW, since our raid team fell apart and we're both too busy to look for a new one. We're both hardcore gamers and we've been burning some serious time on Skyrim, but we miss playing together. While most games have a decent versus mode, it's quite hard to find one with a meaty co-op option.
We'll play pretty much any genre of game, as long as it's good. Last thing we played was the Portal 2 co-op (which was incredibly fun), and we've been playing Left 4 Dead 2 from time to time too, though having to drag two stupid bots along kinda ruins the experience. I had a good bunch of people suggesting that we get Borderlands.
Any recommendations from MMO-Champion?