Exit the lift and grab the pick ups on your left. If you look to the right you’ll see a corpse being munched and limbs dropping to the floor. As you advance a corpse will levitate out of the room and two imps will spawn in. Head round to the right, there are more pick ups in the dark corner on your right then head through the door. Another imp will spawn in behind you. Take the door on the right and you’ll find a couple of zombies in the toilet and a maggot. Pause to admire yourself in the mirror and then climb the ladder in the top right of the room.
You’ll receive a radio transmission, crouch down and head through the tunnel to your right, you’ll find some pick ups and another maggot. Get back into the tunnel and follow it round to the right. If you look through the floor grating you’ll see a zombie chowing down, head towards the red light, drop down into the corridor and take out the waiting imp. Heading on take a left at the broken door and you’ll find another imp and a maggot will spawn in, take the door on the right and waste the zombie who was chowing down, watch out! The corpse he was feeding on will rise. Grab Andrew Chin’s PDA from the desk on your left and check the security cameras on the monitor and you’ll see a guy in Engineering Coolant Control. Use the medical station if you need it and then head back out and turn right.
Head through the door, take the door on your right and you’ll find a maggot and an imp will spawn in. Check out the view of Mars through the window on the right, take the door on the left. An imp will spawn in up on the left, take the next door and you’ll find a z-sec, head along the corridor and through the next door. You’ll see some z-secs through the window to the right, they’ll be coming up behind you, proceed through the door and take out the maggot that spawns in then turn and deal with the z-secs.