Rising Storm: Game of the Year Edition is normally $20, but the Humble Store is giving it away for a limited time. It gives you asymmetrical warfare to change up the combat. You have large-scale multiplayer to work with and things like solider morale affects your team’s performance. This includes all of the Red Orchestra 2 multiplayer content as well – using realistic audio effects to bring you into the game. It uses revamped WW II weaponry and has full mod SDK and Steam Workshop support. At $20, it looks solid and at $0, it’s a no-brainer.