Aliens have invaded earth and want the carbon in our bodies, only the remains of Earths military are left to save humanity and you're the man to do it. Cybernetically enhanced, your mission is to repel the alien invaders in fully 3D levels. C12 plays as a third person shoot em up much like the Duke Nukem Playstation series, you must run through ruined cities killing aliens and their cyborgs while completing tasks such as restoring power to the subway system to progress further into the game.