Are you and your friend looking for free-to-play co-op fun? Then, try out the following fantastic games on Steam.

You can get Warhammer Vermintide 2 completely free to keep on Steam, but there isn't long to grab this co-op masterpiece, so don't wait.

Steam users can add a popular first-person co-op game with a 'Very Positive' review average to their game libraries for free, ...