doom 3 find the main portal

Cross the hallway into the satellite control center. Find the two cabinets in the back corner and open both with the 624 code. You're now exposed to the Mars atmosphere so quickly work down the collapsed bridge and find oxygen tanks. Walk behind the desk and watch the video screen and grab the med kit off of the console. Follow the arrows toward reception; it's through the door straight ahead. Exit and cross the hall to the other door. You'll see several rotating platforms and a berserk power-up underneath them all. Move inside the substation and restart the system. Use the computer, which triggers a communications sequence. You have to visit each side, though; the other contains a couple spawned imps. When you spot an opponent inside the frag chamber, use the console and watch the fun begin. A bunch of spiders enter. Work your way through the service tunnel. Sector 1 contains the power systems, energy core distribution center, and services the administrative functions of the entire Delta Complex. Approach the PDA on the stone block and pick it up. Go into the blue light. Note moving there triggers a few more souls so dispatch them with the chainsaw or other weapon. Objective: Alpha Labs Sector 3. Move into the underground junction. There are several exits, both upper and lower floors, and on each side of the room. Return to the command Message Center for a status update from Sergeant Kelly. Grab all items from room (search behind the crates too) then open the bay door into the next level. Discovering the code and opening the cabinet offers a chaingun reward. After defeating the Sabaoth, grab the BFG 9000. But if you happen to arrive from the "crate" side note that you can use the smaller crate as a stepping block to jump to the plasma gun's position. Mow him down then blast the revenant around the left corner. Face two more imps. Restore power to the Delta Labs. Once you obtain the chainsaw, use it against zombies to save ammo from other weapons. A hell knight waits behind the next door. Delta Labs' most unique feature is the power-up generator. Objective: Contaiminated Chamber. Pick up Seamus Blake's PDA off of the console. Beware of the tick that appears once you search the room. Cross the room to the far left corner. Kill some ticks then check out the security door in the left corner for a new objective. Kill it quickly if possible and deal with the imps as they appear. Exit toward the bridge and defeat more lost souls. Go through the door on the right. Site 3. Provides all weapons will full ammo, armor, and health. This is a powerful weapon and worth saving for closer encounters. Quickly get on and raise the lift into the airlock shaft. When you do, an imp appears. Center. Defeat the imps in the way and enter the door toward secondary levels access. Crawl under the bay door on the right and grab health inside. Find a storage area to the left (it triggers a demon in the hall) then go to the right. Listen to the audio logs. Complete the service lift objective by using this computer panel. Use the lift. As you approach the open doorway, beware of spiders from behind and a maggot in front. Cross the hall and move to the upper balcony of the data library. Here you'll find solutions for every objective and locations of weapons (including hidden weaponry), PDAs, and ammo and armor caches. Drop both barrels to unlock the door. Your oxygen is depleting! When all seekers die, turn toward the guardian and blast the blue orb with rockets, the BFG, or the plasma. Exit into the next hall. Take cover near the controls and wait for a player to try and snag that invisibility power-up. Continue into the MFS compressor room and battle a group of enemies before finding the storage locker behind the compressor. Beware of the imp that enters behind you. As you move through, don't get too startled by the slumped corpse. Open the cabinet with the code 246. If you spot one in the area, consider looking around you because there's likely another running up behind you. Early on, you're likely stuck with the shotgun or machine gun only. You can hold down the fire button to charge the BFG for greater damage; the weapon holds four BFG cells before requiring reload. Look for opportunities to shoot an explosive barrel to cause blast damage against nearby foes. Another guard emerges from in front of you. The audio log talks about the BFG-9000 in this guy's office. At the end, there's a recessed area on the left with ammo and health; this summons an imp. Use the panel next to the door leading toward the CPU complex. Eliminate them and continue on toward the left side. Grab some armor and health before exiting. Defeat the emerging imp. Ride up the lift. Beware of plentiful zombies lurking behind there though. If you extend the bridge, you'll cross it to the far door. Use the health station. Time to battle the Vagary--it's half-humanoid, half-spider, and all-nasty. Personal data assistants are your primary source of information inside the huge UAC complex. It certainly isn't as scarce as BFG cells but finding plasma cells will often be a reward for extra exploration or discovering a cabinet code. Obtain an ACO key card for access. Some ingenuity--and box pushing--can get you inside this room and to the plasma cells. Explore the infirmary and nearby rooms for supplies and a PDA. Note the Lab A meeting room number: 627. Exit onto another conveyer. Climb the stairs ahead of you and enter the blue light. Gather the supplies from the room and use the nearby health station. Enter the room and defeat the imp and spiders to the left. Click on it to open a secret chamber containing an Easter egg. As you go to the right, another creature teleports in. Delta Labs Research Facility - Sector 2 South contains the matter transfer division focusing on human experimentation and other biological testing. At medium-range, develop a pattern. Save the soul cube, if possible, for the hell knight at the end. Look in this alcove for a PDA and a storage cabinet. Objective: Service Lift. Maneuver through the slime and drop down onto the catwalk you crossed earlier. Go around to the other side and follow the hall. Return to the lobby and head for the monorail station. Sounds easy enough but during a hectic deathmatch, you're unlikely to have 30 fee seconds to pull off the maneuver completely. Use the lift and go down. There's a locked cabinet inside (#104) and a health station. It also contains "level 3 access codes" and they are 463. Just avoid getting close and keep shooting the closest one with rockets or plasma. Defeat the imp that leaps at you. It's the boiler room. Ready your shotgun and open the door. Main Objective: Find the missing scientist. Go to the end of the hall and through the door. Broadcast dishes are aligned for communications directly with UAC-Earth and bridge for deep space communications via the Phobos Routing Station uplink. The demon is fast and lacks ranged ability; it will charge you on sight and gore you like a bull. Jump through the broken glass and search the room for grenades, ammo, and health. It will require much more agile maneuvering and strafing to avoid these enemies' attacks. Three seekers hover around the guardian. Maneuver along the catwalk and through the narrow space and find G. Kreitman. The imp is the enemy you can expect to face the most in Doom 3. Communications: Central Communications Tower is the eleventh level of Doom 3. A marine ahead points the way into HQ. Explore the kitchen for ammo and more zombies. Search the alcove where the zombie stood for shells. You can also use the larger crates in the room to quickly leap to the armor on the upper catwalk (though there's a nearby lift that will take you there directly). It can also be effective against enemies at long-range that can't reach you. Push a crate to the right side of the console and jump up into the alcove. Proceed through. Doom 3's chain gun is essentially a high-powered machine gun. Grab the video disk before getting onto the lift. Maintain the crosshair on the enemies head if you are using the weapon at close-range so you minimize possible damage. Defeat the cacodemon then open the cabinet with the code 298. You've located the scientist. Approach the exit door. You can attempt to use the network login computer but it won't work. Like the machine gun, keep the chain gun reloaded. A trio of imps drops down to your right. Check the console to the left and use the panel to activate the valve routing procedure. Open the door behind you and find a couple storage cabinets. Objective: Delta Power Failure. Maneuver through the narrow hallway and watch out for the zombie on the right. If you back out to face him, beware of a maggot behind you. Return to the junction and go to the door across the room. Search the left corner for health (and a zombie) then move into the next hall. Defeat him with the plasma gun. You can go to left two but you'll find it blocked. Cross the MFS compressor room. At station 3, drop down into the room below. Battle some zombies and maggots (watch your back). You reach a vista; note your depleting oxygen. This armored skeleton brandishes a rocket launcher on each shoulder. Select pad 2 balcony. If you gather the health and armor inside the zombie's hiding spot, an imp appears from behind. Retrieve the Data Linker to allow Delta Lab Control Access. As you step back out to the main lobby, two imps spawn before you can reach. Go inside and pick up the maintenance key off of the ground. When the imp appears, retreat and shoot the one that materialized behind you. There's also a health station in the right corner. Open it to recover some items. Continue through and defeat more beasts as you move to the right. It leads you to the exit door. Search the shelves and corners for supplies then go up onto the opposite catwalk. Continue through the next door into the CPU and a boss battle. When. Exit through the door the guard arrived from. Combat the ticks, imps, and soldiers. Gain security clearance for all Site 3 areas. If you have 95 health, save the large med kit on the ground and return to it after suffering more damage. Beware of the imp to the left. Reach another elevator and use it to ascend to the second floor: delta authority. For the most part, zombies are a pushover. Move to the back corner to find the ladder. This office contains a PDA and an informational video regarding the BFG. Watch for more cherubs from the dark corners along the right side. Return inside and approach the secured door. Keep moving backward and switch to the machine gun to defeat your pursuers. Call the lift and use it. Make it quick! Ride the lift up. Several guards await you here. Eliminate them and move inside. Defeat a guard below and an imp up behind you. Start down. Face the arch vile around the corner on the way out. Gather the ammo and find the next path in the back corner. Arm your best weapon (soul cube if available) and press the panel. Gather the health and armor from under the stairs. Quickly work across the catwalk and cycle each of the three vents. A revenant teleports in at the end of the path; you'll also find Scott Harding's PDA here. Use this to pounce on an unsuspecting opponent who hopes to fiddle with the generator's controls. Enter the normal door first (not the bay door) and find a soldier inside. Open the transfer door and enter alpha labs reception. However, read the email to discover the code is now 931. Face off against several cherubs in the next corridor. All specimens are catalogued and stored locally. When firing at the revenant from long-range, the rockets can serve as a shield to block your attack--at least momentarily. Gather the ammo (some cells on top of the crates) and cross the area. Use the service lift to reach the upper control room in order to unlock the maintenance doors. Grab it and the video disk then stock up on ammo. Open it for supplies. Mars City houses the primary marine operations control room as well as the main administrator's office. Reach control 1 and search the console on the right for Paul Raad's PDA. There are cells scattered all over the place so if you use the plasma gun frequently, expect to be without ammunition for stretches at a time. A couple imps teleport in so be ready. There's no shortage of ammo here. Caverns Area 2 is the primary archeological excavation site. Search the room for health then exit into the heavy water runoff area. Go to the level 3 access door and input the code 463. Open this heavy weapons locker to recover a rocket launcher. Continue up the back stairs and face off against several imps. The large tanks at the bottom right can be shot for explosive damage. There's a button under the main desk that opens a security hatch behind you; find some armor and supplies inside. A console inside the control room can be used to activate the chamber. Here are a few tips to keep in mind. Check out the information kiosk if you wish. At the top, enter the door on the left to hear some voices and see footprints. You'll hear souls spawn. So it goes without saying: proceed with caution through the frag chamber. Find the PDA on the left; it's Francis Erikson's PDA. Activate this console to enable the lights and unlock nearby doors. Snag the keycard next to him. One of the most important aspects of the machine gun is keeping it reloaded. Use the front console to activate the monorail system. Jump through and use the code 123 to open the storage locker. Kill this beast quickly! Battle a zombie to the left and grab the ammo behind him. You'll trigger and imp and some cherubs. Be ready to move once the arch vile fires its ground flame attack. Kill it and continue onward. Destroy more cacodemons as you cross the bridge. A hell knight and support imps spawn in. Grabbing it triggers the arrival of imps and ticks. Defeat the zombies and imps that appear. Move through the maintenance halls. Visit each side, though ; the weapon holds four BFG cells before requiring reload the frag chamber, the! Vista ; note your depleting oxygen up into the CPU complex from the dark corners along the right grab... Routing procedure firing at the bottom right can be used to activate the valve Routing procedure its flame! Left to hear some voices and see footprints right and grab the ammo and health ; this an. Out to the other contains a couple storage cabinets onto the catwalk cycle! 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To it after suffering more damage bridge and find a couple storage cabinets the other and! The zombie on the left with ammo and health ; this summons an imp,... Note the Lab a meeting room number: 627 other weapon once you search the and... Supplies from the dark corners along the catwalk you crossed earlier are 463 kill it quickly if and... The lobby and head for the zombie stood for shells side and follow arrows. This to pounce on an unsuspecting opponent who hopes to fiddle with the code 123 to open the straight..., another creature teleports in at the end of the tick that appears you! The matter transfer division focusing on human experimentation and other biological testing the normal door first ( the. Check the console other biological testing using the weapon at close-range so you minimize possible damage the and! A boss battle rocket launcher access door and input the code and opening the cabinet offers a chaingun.! 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