After escaping the tournament, the Delta Squad returns to Earth only to find it unrecognizable. A wave of infectious machines has begun its invasion, tearing across the East Coast and pushing humanity to the brink.

The Syndicate steps in to contain the threat, but their real plan is far darker: seize control of the nation, and then the world. Meanwhile, the Commander has brought something far worse back with him—Mr. L, a vengeful spirit now wearing the Commander’s body as a weapon.

As the Syndicate and the Guardians wage open war, the Delta Squad are trapped in the middle, hunted by enemies both new and familiar. To survive, they’ll need to forge an unlikely alliance... and fight harder than they ever have fought before.

As the world burns, loyalties fracture as the Delta Squad fights for survival. And this time, not everyone will make it out alive.