Introduction[]
You are a marine, one of Earth's toughest, hardened in combat and trained for action. Shortly after you report for duty at the Union Aerospace Corporation's Mars research facility, a massive demonic invasion overwhelms the base, leaving chaos, horror and uncertainty in its wake. As one of only a few survivors, you must use overwhelming firepower and all of your combat skill to battle through" the demon hordes, find out what went wrong and prevent the evil from spreading. Only you stand between Hell and Earth,