Portal 2
Oh look, another Valve game is on the list. This time we’re spotlighting Portal 2, a game that shipped with a fantastic single-player campaign and didn’t need more. Yet, Valve also tossed in a damn fine co-op mode, too, complete with its own story, characters, levels, and mechanics. You’ll probably need to play this one with someone who has patience, loves puzzles, and has a strong stomach, as portal hopping can cause some motion sickness. But with the perfect person, Portal 2 co-op is an amazing experience that is both immensely satisfying and fun. -Zack Zwiezen
