Defense Grid 2 is the definitive evolution of the classic tower defense strategy game. With a story-filled campaign, 21 challenging maps, cooperative and online multiplayer modes and dynamic new mechanics, each game is a unique experience. Build, experiment and hone your tactics as you take on waves of enemies in action-packed futuristic settings. Create your own levels with DG Architect and share them on Steam Workshop. Dive even deeper with the Special Edition, which includes exclusive content such as art books, behind-the-scenes images and an original story by author Mary Robinette Kowal.