Resource Operations

Resource Operations, also known in short as "Res Ops", is the second level of Doom (2016). It is the main communications center for the UAC Mars Base. Mission 2, Know Your Enemy, takes place in this level. The chainsaw and the heavy assault rifle are introduced in this level, as well as the plasma rifle via a secret.

Description
Resource Operations was one of the earliest structures built on Mars after the Argent Fracture was discovered. Besides communications and networking, functions contained in the area include plasma processing, mining of ores and metals, isotope stabilization, and analysis of artifacts. Employees at the UAC Mars Facility are assigned to a tenure in Res Ops before moving on to specialized roles.

Mission 02: Know Your Enemy
To determine the status of the demonic invasion, the Doom marine must realign the satellite array in Resource Operations. After restoring power, the marine finds a pre-recorded message from Olivia Pierce which seems to confirm she had a hand in the invasion; he then fights his way to the satellite controls and realigns it, but Samuel Hayden intervenes and blocks the marine's access to the information he wants. The marine travels to another terminal at Hayden's request, where he is provided with an Argent cell as well as information confirming that Olivia unleashed some kind of "Hell wave" that has transformed the majority of the facility's employees into the possessed. Hayden again insists that the facility's work is for the benefit of mankind, but is interrupted when VEGA reports that the foundry is about to experience critical failure; as Hayden confirms that he and the marine would not survive a meltdown, the marine heads there at once to reactivate the cooling turbines.

Objectives

 * Discover the Cause
 * Restore facility power
 * Gain satellite array access
 * Find yellow access key
 * Destroy the Gore Nest
 * Realign the Resource Ops satellite
 * Go to the VEGA terminal


 * Stop the Meltdown
 * Proceed to the Foundry Airlock

Essentials
As the level starts, you will be contacted by VEGA who will activate the challenge system for you (see below). Go through the door in front of you and head up the stairs to a dark hangar with possessed scientists and an imp, then force open the north door and head past some more possessed to find a staircase leading to a control panel that you can use to reset main power. Head down the stairs and use the now-active automap station then return to the hangar and use the panel on your right to open the maintenance bay doors, drop down and kill any waiting scientists then follow the walkway until you see an imp teleport in above you. Kill it along with any other imps and scientists that come round the corner, then continue following the walkway to another door that needs to be forced open; as soon as you are through, shoot the approaching possessed engineer and it should be propelled into the scientists behind it before exploding.

Go round the corner and head through the next door, which opens automatically, to enter a tall chamber with scientists and possessed soldiers followed by some imps. After killing everything, head round to the other side of the pit and go through the door here to enter a locker room; there is a health station on your left as you enter the room, and you will find the chainsaw stuck inside a corpse by the lockers. After taking the chainsaw, head through the mesh door and kill all the enemies waiting on the other side - there is a door at the other end of the hall which requires a yellow key, so interact with the terminal next to it to bring up an echo recording showing where the keyholder went. Look right to see a conveyor belt with a large crate passing across it at regular intervals; on the other side of the belt is an opening in the wall with a gas canister behind it, so carefully time your run into that opening (if you are hit by the crate you will be pushed into a fatal laser grid). Turn left and wait for the lift to come down, then ride it up and follow the vent to an armor pickup. From here you can drop down to a locked room with some more scientists before following the corridor to another door that has to be forced open.

Behind the door is a room containing a gore nest; kill the scientists around the nest before you tear out its organ, as this will cause a group of imps and soldiers to enter the room. Once all the enemies are destroyed, go down to the bottom floor and look for an elevator; you will see the recording of the keyholder wander into it. Ride the elevator up to a walkway and follow the recording past a combat support drone until you find that it came to rest against a maintenance door; take the yellow key from the corpse and quickly kill it when it tries to get up, then pull open the maintenance door and kill the scientists and imp waiting behind it. Drop through the hatch that the imp opened to return to the yellow door room, then head through this door and pass through a second doorway in front of you to find a dead soldier holding a heavy assault rifle; after taking it, use the health station to your left if you need it then use the panel next to the door to open the airlock. Enter the airlock and use the panel on your left to open the exterior door, then kill the soldiers waiting behind it before heading on to an area with lots of imps guarding a Berserk powerup. Grab the powerup and use it to destroy as many enemies as possible before it expires, then finish off the stragglers with standard weapons.

Once all the enemies are killed, continue following the path until you find a slope leading to the upper floor then go up it and look for an elevator on your left. Call the elevator then ride it up and follow the passage to a control panel that will align the satellite; Samuel Hayden will intervene and ask you to come to the VEGA terminal where he will provide you with the information you need. Take the elevator back down to ground level and kill the imps that appear, then head over to the repositioned satellite and climb up it until you reach the red struts at the top. Follow the struts to an armor pickup then head forward until you can drop down to a door marked "VEGA Server Station" which has soldiers (and possibly a possessed security) waiting behind it. Use the panel in this room to cycle the airlock and open the next door, kill any approaching scientists and imps then go into a glass booth to find a security terminal that will unlock the next door. Go through and kill the waiting scientists and soldiers then head straight forward through another door, kill some more possessed on the either side then head up the stairs to find the entrance to the VEGA terminal.

When you enter the terminal chamber, Hayden will offer you an Argent cell; take it and route it to whichever upgrade you want, then VEGA will summarize the current situation for you. Once the conversation ends, leave the chamber and go through the right-hand door to find an airlock - interact with its terminal to finish the level.

Challenges

 * Two-fer
 * Kill two of the possessed with one trigger pull from the combat shotgun. This challenge can be easily completed by luring two possessed close and using the Explosive Blast modification for the shotgun.


 * Variety is the Spice of Death I
 * Perform five different glory kills on the possessed. The type of glory kill will depend on the angle the player faces the target; e.g., facing an enemy's back or side will trigger different glory kills.


 * Quite the Explorer
 * Find three secrets. This level has eight secrets in total; the two Doomguy collectibles and three elite guards all count for one secret each, the classic level area is the sixth, and the remaining two secrets are listed in the "special items" section below.

Classic level
After opening the maintenance bay door near the start, drop through it and follow the walkway until you see an imp teleport in above you. Climb up to that ledge to find a chestplate pickup then walk to the end of the crane and carefully jump over its left side to reach a ledge (if you miss you will fall into a fatal pit), then climb up one more step and turn left to find a lever that will open a square door below you. Behind this door is the middle section of Doom's ; two soldiers will teleport in as you enter the room, but you can pick up the armor bonuses here to restore some armor.

Special items
After restoring power and seeing the message from Olivia, jump from the top of the stairs to catch a dark overhead ledge. Turn right and crouch into a vent that leads to a secret shield pickup.

When you drop into the tunnel containing the first elite guard (see below), head straight forward to a second bloodstained hatch that you can climb up to find a secret plasma rifle. From here you can turn round to find another vent leading back to the main level.

Trivia

 * The first Codex entry for Resource Operations states that anyone wanting access to restricted areas must submit a Delta-Q Delta form to the Departmental Enforcer. This is a reference to the IDDQD cheat from the original Doom.
 * Datapad #1 unlocks a Codex entry which includes a reference to submitting form WAD-E1M4 to a Command Controller. WAD refers to the file format used by Doom-engine-based maps, and E1M4 refers to the "Command Control" level from the original Doom.