N.O.V.A.: Near Orbit Vanguard Alliance

Since Earth can no longer support life, huge artificial satellites called "Near-Orbitals" have been built where humans can live. To protect themselves, the Near-Orbitals have joined forces and founded N.O.V.A., the Near Orbit Vanguard Alliance. Against his will, retired Marine hero Kal Wardin is forced to return to active duty to prevent the destruction of humanity.