VEGA Central Processing

VEGA Central Processing is the twelfth level in Doom (2016), the complex which contains the supercomputer in which the UAC Mars Base's sentient artificial intelligence VEGA is housed. Unlike the rest of the Mars base, this facility is located in the region of Mars' polar ice cap, in order to aid in the facility's massive cooling requirements. The twelfth mission, I Am VEGA, takes place here.

"You reclaimed the Crucible and are returning to Mars. You must close The Well, the power source of the Hell portal on Mars, to do this you will have to make one last Hell-jump. Samuel has a plan to send you back to The Well's location, he will need your assistance to carry it out."

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Description
VEGA's processing center is located at Mars' polar ice cap, both to hide its inner workings from prying eyes and to aid in supercooling VEGA's central core, which has an operating temperature exceeding 1.2 megakelvins - 173 times hotter than the surface of the Sun. Much of the cooling is provided by the only system known to exist, which according to VEGA took years to perfect.

Mission 12: I Am VEGA
After retrieving the Crucible from the Necropolis, the Doom marine is pulled back to Mars by the dimensional tether and finds that he has been sent to the planet's polar ice cap. Samuel Hayden explains that he has a plan to send the marine to The Well, and VEGA then reveals that the power required to sustain its operations can instead be used to send the marine to the Hell portal's source; as VEGA would not survive the process and cannot self-terminate, it will instead walk the marine through the procedure. After disabling the security networks protecting VEGA's key systems, the marine is directed to destroy VEGA's four coolant generators which causes its primary systems to begin to meltdown. The marine then heads for VEGA's central core, which contains unrefined Argent plasma, to complete the overload process; just before it is destroyed, the marine makes a backup of VEGA, seemingly without Hayden's knowledge.

Objectives

 * Close The Well
 * Gain access to VEGA main security terminal
 * Turn off security switches (0/2)
 * Access Cooling Room
 * Destroy cooling coils (0/4)
 * Access VEGA's Core
 * Destroy VEGA's neural processors (0/2)
 * Overload the VEGA core

Essentials
Head into the booth in front of you and go through a door to find a tunnel leading to an airlock. Cycle the airlock to get outside then climb up the structure in front of you and head forward down some wreckage to find a wall opening leading inside the building. Head forward to a shaft and follow the yellow catwalks down to the bottom, killing any imps that climb up from below, then go through a maintenance door to find a hatch leading down to the security area, which contains one berserk and one invulnerability powerup that you may want shortly. VEGA will explain that you must turn off two switches to disable its security networks; pull the switch in front of you then turn round to dispose of some imps and possessed soldiers followed by revenants and mancubi. Once the area is clear, head down to the bottom floor to throw the second switch then go back up to the entry point and use the console to make VEGA's key systems vulnerable. Kill the cacodemons, Hell razers and cyber-mancubus that appear then go through the door on the top floor to reach the "clean area".

Head round the corner and go through the split door in front of you, ready to face some possessed scientists, pinkies and mancubi that are lying in wait, then head forward and turn left to see three elevators - one is inoperable while the others contain possessed security and a BFG core. Use either elevator to go down to the cooling area, then head through the next door to enter the chamber containing VEGA's four coolant generators which must all be destroyed by shooting their blue power cores; more demons will appear after you destroy each generator, but there is a berserk powerup in a tunnel at the back of the room that can help you. Once the last generator is destroyed, kill any remaining enemies then head for a loading bay at the back of the room and use its panel to lift yourself up to an overhead doorway leading to a massive ice tunnel. Drop down to the train that arrives below and let it take you into the next room which initially contains cacodemons and barons of Hell that will be followed by imps, cyber-mancubi, revenants and a summoner which will produce plenty more monsters - use the Haste powerup above the train and the BFG cores in the room to kill them all more easily.

Once the room is clear a forcefield at the back will drop - go through it to find an elevator leading up towards VEGA's core. Once the elevator reaches its destination, head straight forward to a large pair of doors which will open as you approach to reveal the core chamber. Approach the spherical objects either side of the core and pull out their energy cells, then go to the console on the elevated platform to destroy the core and automatically finish the level.

Challenges

 * Variety is the Spice of Death III
 * Perform five different glory kills on imps.
 * Approach imps from different angles, including from above, to perform different glory kills.


 * Gore Piñata
 * Kill three demons with one frag grenade.
 * Use the Equipment Power rune to increase the grenade's explosive potential.


 * My Teeth are Sharper
 * Kill a cacodemon with the chainsaw.
 * A cacodemon requires three units of chainsaw fuel to kill. Getting it to come down to ground level first is advised.

Classic level
Follow the directions in the "Other items" section below to find the second elite guard, then check behind the boxes it is sitting against to find a lever and pull it. Go back down the hatch you used to reach the blue key area to find that a wall has opened leading to the blue keycard chamber from Doom's. Take the chaingun and health bonuses here if you need them.

Special items
On entering the clean area, go round the first corner but do not go through the split door in front of you; instead, turn right then left to go down some steps and then left again to find a windowed door. The automap station can be found behind this door.