Tep the Destroyer

An alien force has broken through every defense line humanity had. In desperation, an old option is reactivated: the Destroyers, a small group of ruthless AI combat commanders who were legendary in their time for ending wars by systematically dismantling the world's militaries — achieving lasting peace through overwhelming force, before being judged too dangerous to remain active and locked away permanently. Five hundred years later, the lockdown ends. Take control of TEP, the strongest of them. Emerge into a world of total devastation. Find better weapons, defend the humans who are still alive, and track the alien threat back to wherever it originated.