Spooph next time you and Adam are over you guys should co-op. And don't knock it until you try it. I've had people that really dislike video games play Portal 1 and they love it, finished the whole campaign and then some.
I picked up Portal 1 off Steam when it was free. Awesome, but on the short side. Cause I'm cheap, I figure I'll wait until they run the same deal again for Portal 2!