I was hooked on this game in college and for good reason. One of the best co-op experiences I was able to have, especially with friends and when we were new to the game. It really requires teamwork to be successful in this game, which should be the case in a co-op game like this. This same trait also makes it kinda rough if your team is out of sync or there's just one guy who's not as good or game-savvy as the rest. The fun kinda gets sapped out as well once you learn all the optimal strats.