It came from Cursed Earth....

Following the Atomic Wars of 2070 most of the U.S.A. became a radioactive wasteland. With only the three Mega-Cities surviving (on the East Coast, California, and Texas), the remainder of the country became known as the "Cursed Earth".

Although considered unfit for human habitation, the Cursed Earth is populated by all manner of creatures, scraping a living in a tough environment. Since the Atomic Wars, genetic mutations appeared, but mutants are banned from living in the cities, so they are forced to make their homes in the Cursed Earth.

I took a quick snap of this poor creature, before I put him out his misery....