Illegal Alien Tower Defense

Shapeshifting Alien Trespassers have invaded Earth! Their vile species, known as "Third-Worlders", hails from the third planet of a nearby star system, and have now unleashed their rampaging hordes, consuming everything in their path, seeking to turn all of Earth into a dumpy Third-World Hellscape! You play as Johnny Righteous, a mild-mannered computer programmer working at the Department of Defense on a top-secret Defensive AI, known as Sentinel, before it was mysteriously cancelled. Now, using the last copy of Sentinel's code, it is up to you to turn back the tides of the invasion. Can you save civilization from the brink of collapse, and restore our High-Trust society? Or will evil Alien Shapeshifters win World War 3 by waging a Third-World War?