A massive demonic invasion has overwhelmed the Union Aerospace Corporation's Mars Research Facility, leaving only chaos and horror in its wake. As one of only a few survivors, you must fight your way to hell and back against a horde of evil monsters.
We find ourselves in another Delta sector, as expected, through a teleporter, where we have to go through labyrinths of horror and S.M.E.R.T.I.. And then we are presented with the first surprise - the lighting has been turned off on the entire level. And our first task is to find the “switch” in the darkness. But the surprises don't end there. After passing a small corridor, we come across a fork where we can take the elevator up, or go through the door on the left. In the future, we will also be allowed to choose paths, although in any case the end is the same.