A group of UAC Marines respond to a distress call from a top secret scientific base on Phobos, a moon around Mars, only to discover it's been overrun by demons who seek to create Hell on Ear... Read allA group of UAC Marines respond to a distress call from a top secret scientific base on Phobos, a moon around Mars, only to discover it's been overrun by demons who seek to create Hell on Earth.A group of UAC Marines respond to a distress call from a top secret scientific base on Phobos, a moon around Mars, only to discover it's been overrun by demons who seek to create Hell on Earth.