You wont fight any demons for a while in this level. Your mission is to restore power to the delta labs. As you walk forward you will see a shadow of an imp on the ground. But it cant hurt you because its outside. This will happen a few times. Get the cells, the backpack, the shards, and the PDA which tells you the code for locker #21D is 298. Go over the railing to an area with shells and armour. Go back up and through the next door. There are more shards in this room and then a corpse will fly through a window. Go through the broken window and down the stairs and pick up the med kit. Next go down the curved hallway to the control room.

Touch the panels to restore power to the labs, but wait , you need the data linker to do that. When you walk back a floor panel will blow up. Go into the crawlspace and continue through the vent. When you exit the vent into another room. Go through the dark hallway to the south for everything else is locked. Go up the stairs to the middle area and pick up the cells and the data linker next to the corpse. Use it on the control panel earlier on in the game. to activate the power. It turns out that you still need to power up a reactor to get power.

When you hear a computer saying "Video linkup requested" approach it and Sarge will talk to you about the problem with the Delta labs. Now go back to the area with the locked doors and you'll finally get attacked by an imp. After that go through the door that is now unlocked. Two imps and a pinky demon will attack you in this room. Now proceed to the access lobby. Go to the opposite door but beware of the commando zombie that lurks near there. Go through the north-western door and kill the imp and get the med kit and some rockets. Now go through the door where the commando zombie was. When through the door kill the imp before he hits you. Get the armour in the middle and then kill the imp that appears. And now go through the next door to the service area. To the right are some clips. Also a zombie from the left and right will attack you. The security armour in the middle of the room will trigger a pinky demon to charge you when you pick it up. Go through the northwest door and kill the commando zombie that attacks.

When inside there will be an imp crawling on the ceiling. Kill it and grab the cells next to the door. Go to the lower part of the room and kill the zombie hiding and use the health station near him. Turn around and shoot the commando zombie behind you. Go through the western door to the warehouse. grab the clip near the door and go the the warehouse floor. When you do six lost souls will fly at you. After killing them go near the shelves and then a revenant will appear. After killing him search the area with the shelves and et the armour, health, ammo, and adrenaline. If you move some crates around you can jump up to the higher shelves to get some health and plasma cells. A maintenance hatch is now open. Go through it into the storage room. A cacodemon is hiding in the northern corner. Pick up the med kit and the clip from the shelf and open the cabinet with the code 298. Go through the northwest door.

Kill the imp to the right then the one that teleports behind you. Pick up the shards near the barrel and the med kit on the other crate and then a revenant appears in the center of the room. Then two cacodemons will come from the north. Blow up the barrel in the east and get the clip near it. Kill the cacodemon and climb the stairs to the reactor support room. When you go near the second turn on the catwalk an imp will jump at you. Go down the lift and when it falls kill the two imps that await you there. Get the clip near the broken elevator and the med kit on the ground. Go near the stairs and kill the revenant that appears. Proceed to the reactor support hallway. Two areas to the left contain a zombie and ammo. Go through the next door to the reactor room. Four lost souls will attack when you enter. When they are all dead go to the ladder and get the clip before you climb up. When up top kill the two more lost souls. Follow the curving walkway and kill the cacodemon. Continue to the end to get some cells and health. Kill the three more lost should near where the cacodemon was. Go back the other way on the catwalk to trigger a revenant to come through a locked door. After you kill him go through the door. Touch the panel to turn on the reactor. Now your objective is to get back to the main lobby elevator. Go through the eastern door.

Kill the zombie around the corner and use the health station behind him. Now go up the ladder and kill the imp hiding in the darkened area. Also kill the zombie in the north east corner and then climb the ladder. Kill the two imps that appear and go through the next door. When you go in three cacodemons will attack you. Pick up the clip and the PDA on the catwalk and kill the lost souls that spawn. Backtrack to the reactor control room. Two commando zombies will attack you along the way. Scan the PDA on the panel in the control room and go to engineering. Kill the imp that attacks you and then jump and walk on the railing to the left to get some security armour. Go down the stairs and under them to get a large med kit and then go through the next door. Go down the stairs and kill the cacodemon. Two more will attack if you go to the western part of the room. Grab the med kit. Climb the stairs to get to another catwalk. Go through the next door.

Kill the commando zombie to the left and ride the lift down. Kill the two imps and go through the western door. Get the large med kit and the shells under the staircase. Climb the stairs and kill the commando zombie. Go through the eastern door. Kill the zombie and take the ammo from the shelves and drop through a gap in the floor. Use the health station and ride the lift up to the junction. To the left there is a pinky demon to kill and after him an imp. Pick up the rockets and med kit in the corner. Go through the door near the med kit and shells. Go down the hallway until you get to an area with four zombies attacking you. Kill them with your shotgun and then proceed and pick up the plasma cell. Kill the commando zombie at the end of it. In the next room there is another commando zombie hiding behind a pillar. Be careful this one has a chain gun and do a lot of damage. Kill him with the rocket launcher and go through the door to the authority lobby.

There are two more commando zombies in here and one has a chain gun. Pick up the ammo to the door's left and go through the south eastern door. Next go through the southern door and kill the two cacodemons that appear. Now go through the western door. Pick up the plasma cell then go down the staircase. Go through the corridor to get back to the main lobby. A commando zombie and a revenant will attack you in the corridor. Kill the two chain gun zombies with the rocket launcher and go in the elevator and ride it up to Delta Labs Sector 2A.