Doom 3 Level-by-Level Guide - Alpha Labs 1: Level 5 of Doom 3 Complete Walkthrough

Use the panel on your right to open the door and reveal an ominously dark room. Switch on your flashlight and enter, there’s a medkit to your left and four zombies to your right. Kill the zombies and you’ll find a medical station tucked away on the right which you can use to recharge and you should find some armor and ammo by searching around. Head to the desk in the centre of the room and activate the control panel and then proceed through the door.

There will be three z-secs waiting there, probably off to your right, take them out and grab the armor shards in the top right corner and then head left. You’ll find a zombie in the next corridor and then opening the door at the end will reveal an imp who will jump at you. Once he’s down and you enter the next room the door at the far end will open and reveal a group of z-secs.

When you jump into the room on your right with the big laser machine in it, two imps will spawn in; one on either side of you. Kill them and then crouch to search under the stairs on the left for a medkit. Head past the laser and up the stairs and enter the room on the left, everything will go spooky for a moment, there will be a z-sec and a zombie to kill and then an imp will come in the door behind you. Grab Kyle Berger’s PDA and the disk off the desk. There’s a medical station in the corner of the room so recharge before progressing through the other door where you’ll find another imp. Head right and use your flashlight to find some armor then head back the other way to activate the control panel in front of the laser.

Now you want to go back out of this area; instead of turning right back to the laser, take a left and go through the door. Use the code from your PDA in Kyle Berger’s audio log which is 752 to open the supply cabinet on your left. Proceed through to the next room and during a break in the laser firing run along the corridor it fires down and quickly hit the panel at the end on the right, then crouch and climb inside. There will be a z-sec waiting at the other end and then a zombie to your left and another one down the stairs. Head to the desk on your right and grab the armor shards then go through the door and grab the medkit on the left before heading along the corridor. Take out the imp and the two zombies and don’t worry about the maniacal laughter.

Head into the darkness where the zombies came from on your right, you’ll find another three zombies to kill and then up some stairs to the right you’ll find a PDA belonging to Jack Smith. Use the control panel to turn off the gas leak and then head back the way you came and through the next door. There will be a couple of z-secs and an imp in the next corridor and to your left an alcove with some goodies to pick up. Go through the next door and you’ll trigger a cut scene, you’re about to meet the maggot.