There's nothing like a tricky co-op video game to ruin a relationship. These multiplayer games will have you falling out with your friends and loved ones.
Playing video games is fun — or, at least, it's meant to be. When it comes to co-op games, players can share the thrills and sense of triumph. But for every rewarding co-op experience, there are games where the presence of another player can feel lik... [6346 chars]