It's really hard to get in the game without any third party help, but once your'e in, it becomes great. 7/10

Great game, everything you expect from valve. in the Co-Op mode you really need the other person, wich i dont see in a lot of other games. 8/10

pretty good multiplayer, somtimes can be Co-Op.Very simular to DayZ accept its free 6/10

Usually this game is played as a single player rogue game, but the Co-Op multiplayer is great. 7/10

The game has a great Co-Op campaign, and is very fun to play 9/10

The game contains a lot of game modes and many of them are Co-Op 8/10