Released back in September 2014, Defense Grid 2 is the sequel to Hidden Path Entertainment's 2008 Defense Grid: The Awakening. Already available on Steam, PS4 and Xbox One, the price for DG2 is being dropped to $14.99 for the Regular Edition and $19.99 for the Special Edition (only available on Steam).
DG2 features 21 story-driven campaign missions, complete with hundreds of challenge mode experiences, improved multiplayer modes, and a procedurally driven audio score. The online multiplayer allows players to not only face each other, but play cooperatively. Unique to the PC version of the game is DG Architect, a level creation tool set connected to Steam Workshop.