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This is page 4 of the complete Doom 3 Walkthrough featuring Mars City, Revisited and Administration.
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Guide written by Kyle Hardeman
Mars City, Revisited
- You'll find:
- 5 PDAs
- 1 Keycard
Mars City, Revisited Enemies
- Imp, Z-SEC Zombie, Zombie
Mars City, Revisited Objectives
- Return to Marine Command.
- Obtain an ACO Keycard for access.
- Join up with Bravo Team.
- YouTube: Doom 3 - Level 3 - Veteran (Time: 14:39)
Mars City, Revisited Overview
- TIP: Keep your weapon ready - sometimes, like now, you'll enter a new area amidst enemies.
- Shoot the Z-SEC Zombie, then head left towards the locker. A ladder will drop down, so climb it to the Ventilation Shaft. There's a suit of armor to collect, so grab it before you drop out of the shaft.
- Head forward and kill the Zombie that attacks you from behind. Another Zombie is further into the room - be sure to take him down. There's a PDA here, so get it, and head through the next door. Two Z-SEC Zombies will attack from the right - use headshots to end it quickly.
- The door on the left is locked, so head right to get the keycard to open it. Head back to the locked door - when it opens, another Z-SEC Zombie will attack. Enter the Spec Ops Junction.
- Have your flashlight ready, because through the next door is a dark room with Zombies inside. Beat them to death with your flashlight to save ammo, and grab the items inside. Head through the door right of the entrance and kill the Z-SEC Zombies that attack to collect extra ammo, then head back and go through the other door.
- You'll be in the Marine Command Access hall - keep an eye on your left, because a burning Zombie will break through the wall after you. At the end of the next room are two Z-SEC Zombies - take them out with Pistol shots to the head. Check the alcove behind them to find some armor shards, but keep your Shotgun out for the Imp that'll appear. Another Imp will show up from behind you, so watch out for it.
- In the Infirmary, you'll find another PDA, and a storage locker to open (347). Open the next door to watch a Zombie revive to attack you, then kill it. Head through the next door - there's a Z-SEC Zombie in there.
- A Zombie is waiting for you around the corner at the end of this hallway. Further down is a Z-SEC Zombie and a PDA - kill the first, take the second. You'll be in Marine HQ, and there's a door here to a combat preparation room. Kill the Z-SEC Zombie and use 584 to open the door to get the items.
- Head out the room and down the hall to find the Marine Command Access hub - an Imp appears on the other side of the room, and another comes from around the left hand corner. Drop them both, and kill the Zombie behind the left hand corner to find some extra stuff. Head through the doorway to the left.
- Open the door and shoot the Zombie Marine before he turns around. Head down the hall to an open room with another Z-SEC Zombie - take him down, and look left to find another Zombie Marine to shoot. Continue moving to the right to find a room with two Zombies and a sentry bot. This is where you learn to love sentry bots - it'll blast the Zombies for you, so grab the ammo and health here if you're low on either (it's in a small room on the left hand side, through the window).
- Follow the sentry bot, letting it kill all the enemies that appear. You'll come to a split path in the ACO Lift Junction hallway - head right to the Common Area to kill a Z-SEC Zombie, a regular Zombie, and stock up on health, armor, and ammunition. Return and follow the sentry bot down the hall.
- The sentry bot will lead you to an open area with an elevator - head to the right to find a crawl space with some Shotgun shells and a ladder to the upper level. Up here, you'll find a fat Zombie and a PDA, which grants you increased clearance. Head back to the bottom level and head past the elevator - shoot the Imp that shows up.
- Once you get to the ACO Offices, use your new clearance to go through the previously-locked door - there's a Zombie in here, so shoot him in the head and grab the armor and ammo. There's also a health Station here if you need it. Now, head back to the elevator you passed and take it to the next level.
Administration
- You'll find:
- 5 PDAs
- 1 Video Disk
Administration Enemies
- Imp, Pinky, Z-SEC Zombie, Zombie
Administration Objectives
- Gain entrance into the Alpha Labs.
- YouTube: DOOM 3 - Level 4 - Veteran (Time: 11:16)
Administration Overview
- CUTSCENE: The two men who got off the ship with the player at the beginning are here, talking about what's going on. Apparently, it's an experiment...
- As soon as you get your foot off the elevator, you'll be attacked by a Z-SEC Zombie from the left - take him down and kill the Zombie that stands up from the bench. Go through the door and head left to find and destroy an Imp down the hallway. Head around the corner to find a large locked door.
- Back track and two Imps will break in through the locked door across from you - they've unlocked the door for you, so repay them with Shotgun blasts. Head down the hall through the first door to be flanked by two Imps - kill them, and move on.
- In the Video Phone Conference room, a Z-SEC Zombie will charge you from your left. There's ammo and health in the lobby, as well as an Imp from behind once you touch the items.
- Head down the hallway, and shoot the Z-SEC that comes around the corner - the hallway leads to a room with a locked door. On the right is a control room, so go in and use the control panel to unlock the door, then equip your Shotgun and blow away the Pinky that comes in through the window.
- Go to the now-unlocked door and kill the Imp that jumps towards you. Down the hallway, a Pinky will tear through the wall and charge you - charge him back with a Shotgun. Move forward, keeping an eye on your rear to deal with an Imp that'll come through the wall at you. A Zombie is around here somewhere, as are some helpful items.
- Go up the stairs in back of the room and stay on the path through three doors - once you hit the Executive Office Access room, an Imp comes at you. Get the ammunition behind the Imp, and head through the next hallway and grab the PDA.
- In the next room are some Zombies - deal with them, and head to the backroom of the Executive Offices area to find another PDA. An Imp will spawn in when you grab the PDA - kill it, and the one that spawns just outside. There's health, Shotgun ammo, and a few more Imps around this area.
- Back track, killing any enemies that appear (including a Pinky in the Data Library) until you get to the first room you started in. Head through the Alpha Labs doorway, and kill the Imp that spawns in. On the way to the Alpha Labs door, you'll encounter a Z-SEC, so deal with him and use the new clearance you obtained from the PDAs to head into Alpha Labs.
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