5 Awesome Co-Op Games Under $15

MMGN.com writes: While a thrilling single-player story is always a great experience, sometimes you want to game with friends. More often than not, it's more of a challenge convincing your friends to buy a new game than it is finding one. So for the cheapskates out there, or people who have tightarses for friends, here's 5 awesome co-op games for under $15.