(ABOVE) Drop off the edge of the floor and redirect yourself into the underpassage with the joystick.Įffect Enemies always dodge your shots and grenades. (ABOVE) This is the maintenance hallway you need to go under for the skull. If players fail, immediately restart from the checkpoint, since there is another checkpoint at the bottom of the fall. Before dropping off the maintenance tunnel, players can nudge themselves into the lower room with a well controlled fall. The skull is under a hallway with small sewer tunnels and the flying aliens flitting in and out. Location After defending the hangar, players are sent to the barracks. Preparation None, but ready to restart from last checkpoint.