Mars City:

After the opening scene, where you talk to the marine in the booth head across the hall as the sentry bot runs past. When you go through the door a short scene will play as reception explains to you about the PDA you receive. When you are back in control, grab the video disk off the desk. Head up the stairs and have a chat with Chang and make a left to continue down the hall until another scene play. Now you are introduced to Doctor Betruger and something sure seems up with him. After the scene, continue up the stairs on the left and follow the hallway around to Marine command on the right.



Head that way and eventually you will come to the HQ door. Enter and a scene will start with Sgt. Kelly. After he explains your next mission, follow the sentry bot. All you need to do for this first part is simply follow the sentry bot along until he reaches his square where he deactivates. When he reaches it, head down the stairs on the right. Go down and on the right will be a supply cabinet that you can open by reading Adam Berneche’s PDA found in the command junction (396). Grab the bullets inside and head over to the control panel on the wall to open the door and call the lift. Enter and press the green button to exit the level.

Mars City Underground:

When you exit the lift, head out to the lobby and talk to the marine in the booth. He will tell you to grab your gear from the glass case that opens on the right. After you grab the armor, gun and health you are given a new objective to reach the Old Comm. Building to find the scientist. Head up the stairs after you are done talking to the marine and enter the door there. Follow the walkway to the right in the Underground Junction. Make your way down the stairs and enter the door labeled Energy Stabilization. Head down the stairs, through the next door to the converge chamber to the end of the energy stabilization unit.



Before you reach the door at the end make a left and there will be a storage cabinet there with a PDA. Read the PDA and you will find the cabinet code 531 to open the cabinet there. Head through the door behind you to convergence chamber two and follow it to the energy chamber. Make a left through the door across from the booth and you will run into a scientist who, oddly enough, you scare. Head through the door on the left but notice how the bridge beside him moved up. As you enter maintenance area one, the light will shut off as you reach the stairs. Turn on your flashlight and head up them to the engineering access door. Enter it and take the lift to communications. Make a left when you exit and go through the door to find the scientist.



Now all hell breaks loose literally and the good scientist in front of you isn’t so any more. Kill him before he gets to you and head through the door to the left of the monitors. Head down that hallway to continue on your new objective to return to the Security Checkpoint where you first got your armor and weapon. Enter the airlock there and ride it to the service passage. Exit the lift and make your way down the stairs. Kill the zombie that appears on the left and continue to follow the stairs. Go through the door and use the control panel on the left to bring the bridge back down and together. Run across when it is in place and enter the next door. There will be two z-secs in here and some skulls flying around. Ignore the skulls and take out the soldiers. When they are down, head down the stairs and grab the PDA from the console. Now that you have it, your security clearance has been updated and you can now enter through the door with the red locked lights at the top of the stairs.



Go through and kill the zombie at the end of the hall on the right. Go left and through the door and there will be a shotgun z-sec at the end of the hall. Take him out and take his gun. Continue up the stairs and through the door until you come to a hallway with a jet of flames on the left blocking your path. Head through to the right and a short scene will play and introduce you to the imps. Spooky looking for sure, but one shotgun blast at close range will take them down. Continue to the right and head along the walk way and down the stairs.



Take out the zombies and imps there and go through the next door to reach Energy Delivery. Go to the left and enter the door there. Head down the stairs on the right and go to the right, past an imp and zombie to reach another door. Enter and go left around the circular walkway and to the next door where you will meet your first red changing room. Grab the PDA off the ground under the swinging body and head back out. Kill the imp that comes through the stairs and head up them when he is dead.



Head for the door on the left that you can now open with the PDA clearance. Now you’re in the booth where you first entered the underground and grabbed your armor and weapons. Before you go down the stairs, go to the left and kill the z-sec laying on the console. When he evaporates, go to the right in the booth and activate the security checkpoint on the monitor. Go back up the stairs and out to the junction and head left to the door there. Go through and you will get a message from Kelly to return to Marine HQ. Kill the imp in the room and enter the elevator and kill the z-sec waiting there.

Mars City:

Now that you are back in the main part of the base, you are told to get your butt back to Marine HQ to receive orders from Kelly. Step out of the elevator and kill the z-sec behind the box. Make your way up the stairs and walk to the right for a ladder to fall. Climb up it and talk to the worker there. After you talk to him, turn around and crouch to walk through the open vent. Go to the left and it will lead you to armor and then to the right. Drop when you reach the end and two zombies will attack. Grab the PDA off the desk and make your way out the door on the left. Kill the z-sec there and head to the right. Go through the door and grab the AOC card from off the desk.



Head back out and forward up the stairs to the red light locked door. Use the card on the panel and enter find two more z-secs. Kill them and head through the door on the left and wait as a few zombies will slowly come at you in the dark. Kill them and head right to go through the next door. Follow the hallway around, and on the left a flaming zombie will appear. Kill him and continue through the door on the right. Kill the few more zombies here and head around the right corner to where an imp will drop down and say hi. Kill him and enter the Infirmary on the left side. Grab the PDA on the table in the center of the room and the voice message will tell you that the code for the cabinet in the room is 347. Grab the armor and health if you need it and head out the next door. Kill the zombie that gets off the table and continue out of the room.



Go to the left when you exit and kill the z-sec there. Go to the right around the corner and follow the corridor around where you will run into a zombie killing a marine. Smoke him and grab the PDA off the ground next to the door. Move forward to where you’ll reach marine HQ on the right. When you hear the voice saying “video link up requested”, walk up to the monitor and activate it to talk to Kelly. He will tell you to join up with Bravo team, a group of marines still alive in the Alpha Labs. Head down the stairs and enter the Combat Prep room and kill the Z-sec there. Use the code on the PDA you just found, 584 and open the door to the security room. Grab the goods and head back out. Make a right, around the corner and a quick left. Go through the door there and down the stairs. Kill the imp who appears across from you and head out the door on the left. Follow it to the exit door to the North Side



When you exit, follow the hallway around to the main lobby and kill the z-secs waiting here. Head through the door straight ahead and it will take you to reception and a sentry bot will show up. Follow him and he will lead you into the ACO lift junction. Here will be the lift you can take up to Administration. Before you enter the lift though, go to the right corner and there will be an open vent. Enter it and climb the ladder and you will find a PDA on the catwalk above. Grab it and then hop back down to the bottom floor and head for the lift there.

Administration:

Step off of the elevator and a scene will play. When it is over, head to the left. Kill the z-sec there and go up the stairs to kill the zombie on the bench there. Go through the door and pop the z-secs and imps that show up. Head through the corridor and to the left and there will be a huge door and a wounded marine name E. Webb. Talk to him and then try to open the large door via the control panel. You will be told that you need to find the PDA of William Banks to open it up. Head back out to where you exited off the elevator and two imps will smash through the door there. Kill them and go through yourself. Follow the hallway around and when the lights go off, two imps will attack. Take them out and the z-sec that appears as well.



Go through the next door and make a left. Follow it around and go through the next door that will take you out to the data library. Head to the right and there will be a room with a glass wall. Enter the door there and grab the armor and shot gun off the desk. Activate the security override on the monitor and watch the next scene. After the introduction to the pinky and the attack, go out through the opening and head for the door on the right. An imp will appear as you go through, kill it and follow the stairs up and to the left. Kill the z-sec, imp and Pinky here. Make a left at the end of the corridor and follow the stairs up to where the Pinky first appeared. Head to the end and go around the corner to get a message from Kelly on your radio. Continue and go through the next door on the right. When you enter the next corridor, you’ll come to a door marked executive offices and an imp will appear behind you.



Take him out and enter the offices. When you go along the bridge with the glass on each side of you, you will see Swan and his body guard below you talking. Continue to the next door and take out the zombie and z-sec there. If you go along the right side, you will come to William Bank’s office but his PDA isn’t in there. Go along the left side and you will enter Dr. Betruger’s office that has candles and a growth of sorts in it. Grab the PDA off the ground and some Imps will teleport in to battle. Take them out with some shotgun blasts and head back out across the bridge and go through the door there. Hop over the railing and go through the door on the right. Now you will be where the two imps crashed through the door in the main lobby. Head up the stairs and return to where the downed marine was. Use the PDA and go through the door to the Alpha Labs.

Alpha Labs 1 East:

Scared yet? You should be. Press the control panel to open the door and enter the darkened room. To the right will be 3 zombies at the rear of the room and one at the end across the room on the floor. Kill all of them and use the control panel behind the desk in the center of the room. Press it and go through the next door. Kill the z-secs on the right and head to the left. Follow the passage and head to the next door. Kill the imp there and there will be a room on the right with a giant laser that fires down a corridor. Jump through the open windows and kill the two imps that appear when you hit the floor. Make your way to the right and then left and go up the stairs to enter the small control room called the EPD Lab. Kill the z-secs in there and grab the PDA and video cd. After the little spooky scene kill the imp at the doorway and use the med station in the back of the room if you need to.



Go through the door across from where you entered and make a left. Use the control panel there to open the repair gates at the ladder and kill the z-secs and imp that appear. Head back through the EPD lab, through the two doors and use the code 752 on the supply cabinet there that was in the voice log on the PDA. Head down the stairs to the open gate on the right where the laser shoots through and run down the tunnel when it stops. There will be a panel on the right side to activate that will open a small vent. Crouch and go through it to come to the EPD particle Filter. Kill the zombies here and head down the stairs and through the next door. Go along the hallway to the right and the lights will shut off as you go around the corner. Continue down the stairs and kill the zombie that walks out there.



When you reach the bottom of the stairs, there will be a door on the left. Ignore it for now and go to the right through the darkened hallway. Kill the few zombies that are along there and go up the next set of stairs to find Jack Smith’s PDA and a control panel beside it to breach the gas leak which would have been blocking your path. Head back down the stairs now and go to the left and through the door in the other room. Go through and follow the corridor around to the right and kill the z-secs and imps there. Keep going around the next corner on the left and you will come to another door that will lead into a disturbing scene. After it is over, you will be introduced to Maggots, the new two headed enemy you will face. Kill them and go through the next door. Hop into the open grate in the floor for some ammo and then hop back out. Go through the large bay door to enter the next section.

Alpha Labs 1 West:

Walk down the hallway to come to a door with a z-sec in front of a lot of barrels. Shoot the barrels to take him out easily and make your way to the right. Run across the bridge quickly as the grates will drop as you touch them. Go through the next door and some barrels will get thrown down on your head. Keep moving forward and go up the stairs on the left. Head to the left and kill the imp and z-secs that come through the door there. Continue through the Hydrocon condenser and head up the stairs on the left.



Make another left and go up another set of stairs and when you enter the room there, the walls will start bleeding and two imps will appear. Take them out and go through the next door that leads to the Hydrocon Control room. Kill the zombie in there and see the two doors on the left and right. You need a PDA to open the door on the right, so go through the door on the left and kill the maggot and imp inside. When they are dead, go to the far yellow wall and around the corner will be a ladder. Climb up it and go around the far corner and squeeze between the narrow opening. Go through and there will be a scientist there to talk to.



After you do, run through the opening on the left and grab the PDA on the left near the opening in the floor. Drop through when you have it and now you will have clearance to get through the locked door. Go through and kill the zombie and enter the next door. Now you will be in the Hyrdocon Lab. Kill the few maggots that come out, but don’t use an explosive weapon or else you’ll break the glass on the tubes and the entire room will burst into flames. Go through the next door and kill another maggot and head up the stairs on the right. Go along the hallway and enter the next room that will have a few more maggots in it. Grab the PDA of Michael Abrams there next to the corpse and then kill the maggots and head for the elevator at the far end of the room to exit the first section of the Alpha Labs.

Alpha Labs 2 East:

Step off the lift and make your way to the right and up the stairs. Kill the imps and z-secs there and enter the door. Go to the end of the hall and there will be a door on the right side that leads to a bathroom. Enter and kill the fatty and maggot and go to the ladder in the far corner. Climb up and you’ll get a radio message about a worker who has trapped him self in storage room c4. Crouch and go through the vents and drop down the opening at the end. Kill the imp there and make your way through the steam and enter room cp01 on the right. Kill the munching zombie there and grab the PDA off the desk. You can also play around with the security camera here on the TV screen. Head out and make a right to the next door. Go through to the walkway that you can see outside from and an imp will smash the glass.



Kill him and run through the next door before your air runs out. When you are in the MFS compressor, kill the z-sec and go through the next door to see a security team run along the catwalk through the glass. Continue along the hall and enter the MFS compressor and walk to the desk on the far side. There will be a video disk, PDA and a control panel for the vent hatch. Grab them and activate the panel and kill the z-secs that appear. Kelly will tell you that the marines know where you are and want you to meet them in sector three. Go through the next door and it will lead you to engineering. Take out the two z-secs and the imp and there will be an open grate in the floor with a ladder going down that will take you to some armor. Go down there if you need it, otherwise just head for the lift in the far corner. Take it down and kill the maggot and imp that are there. When you reach the bottom, head for the large bay door and go through.

Alpha Labs 2 West:

Walk forward and you will come to an office with a scientist named J. Edwards who will lead you through the next part of the level. Keep in front of him a little bit and take out the imps as they appear. Once you reach the ladder, the imps will take him out anyways so there in use trying to keep alive other than the purpose of using his light. Climb up the ladder at the end and there will be a storage cabinet # 039 at the top. Use code 102 to open it and grab the armor out of it. Make your way to the door and head through to find a creepy sight.



There will be webs and bodies wrapped up in here. Go directly forward when you come through the door until you reach the wall. Then go to the right and crouch down to go through the vent there. Follow the vent to the left and kill the trite that sneaks up through the shadows. Drop down and continue to crouch through the narrow passage way. Make a right at the end and you will drop out to an open room. Immediately make your way to the control panel on the far side and active the ladder. It will go up and down until you destroy all the Trites that come crawling out. When they are dead, crawl up the ladder and there will be a few more to kill. When they are all dead, go to the large door and activate the control panel to leave section 2.

Alpha Labs Sector 3:

Step out of the elevator and make your way forward. Kill the z-secs here and proceed forward and around the first right corner. Go up the stairs there and kill the imp on the ceiling and enter the room on the right. When you are in there, you will grab Mark Lamia’s PDA and you will see a control panel that moves the claw in the next room. Move the claw over the barrels and when the red light comes on to let you know it is in range, lower the claw to pick them up. When you close the claw on the barrels, click the “transfer Item to incinerator” button and the claw will drop the barrels down a chute. When you grab the firs barrel, some z-secs will enter behind you. Kill them and then repeat the procedure with each barrel. Once you have all the barrels removed, Kelly will get on the radio and tell you to hurry and find the entrance to Alpha lab 4. Exit out the room and make a right and head up the stairs.



Kill the maggot and go through the door to enter the room where you removed the barrels. Grab the keycard from the center of the room as well as grab George Poota’s PDA that is sitting on the ground. When you have the goods, head back out through the room. Continue up the stairs, to the left and down the stairs there. Go left around the corner and deal with all the z-secs there and make a right around the corner to find some trites. Kill them all and then use the key card on the door there. Go through and get ready for a little ambush. As you walk towards the stairs, imps and trites will appear from both sides. Run up the stairs quickly and kill the maggot as the door opens and let the door close behind you. Once you are in the room at the top of the stairs, kill the imp and z-secs in here and head for the door on the far right.



It will be locked and a rush of trites will come out. Jump up on the box in the corner like a fraidy cat and mow down the trites since they can’t reach you there. Once they are dead, a z-sec will open the locked door and you can go through after you kill him. Kill the zombie in the next room and make your way to the right through the door there. Continue to follow the hallway around and when you go down the set of stairs, use the med station if you need it since you will be heading into a boss battle now. Go through the green light door and you will be squaring off against the Vagary. The Vagary isn’t all that tough as long as you keep moving. The lady spider will toss rocks and grates at you with her mind and if you stop to admire the scenery, you will get nailed by them. Strafe around either far from her and toss grenades, or strafe close to her and pound her with your shotgun. When she does throw an object at you, use the sprint button to move out of the way faster. Keep repeating that pattern while unloading shells into her and she will drop in no time flat.

Enpro Facility:

Head off the elevator and Sarge will tell you to reach the reactor control room and replace the coolant rod. Head through the next door and go down the stairs to the sentry bot on the left side. Follow him for awhile but when it goes up a small set of stairs and through a door in to the Control 1 room, Press the control panel directly across from the door opening to stop a gas leak. From there go to the right side and grab Paul Raad’s PDA from the console. Don’t worry about the sentry bot, he’ll wait for you. Once you have it, continue to follow the bot the direction he was going. When he reaches the end and sits in his square, go to the right behind the pipes and there will be a ladder there. Climb up to reach the power core access. Walk around the corner and there will be an office on the right side where you can hear some crying. Enter the room and watch the scene. Kill the lost souls that appear and then grab the PDA and active that bridge clamps from the monitor panel. On your way back out of the room, stop at the plasma gun cabinet and use the code 972 to open the cabinet and grab the plasma gun. Head out of the office and kill the few more lost souls that appear. When they are dead, head to the right and cross the bridge after it extends.