The world is changing. The Rapture has begun. Years ago, beings known as Angels descended upon the Earth, ravaging cities and decimating armies. Bullets didn't faze them. Nor did bombs, tanks, or blades. They were unstoppable. Insatiable in their desire for destruction. Until that day, when an Angel killed its fellow soldier, and project "Heaven's Gate" was formed. A bioweapons program intended to integrate parts of an Angel's physiology into a human host, in hopes that they could defend their fellow man. A shame none of the necessary test subjects were willing.