Site 03

Site 03, also referred to simply as The UAC, is the first level of Doom (2016). The first mission, Rip & Tear, begins in this level and continues into the Martian Outskirts. The Doom marine awakes from his slumber to find himself trapped in a holding facility overrun with demons and possessed personnel. He quickly reclaims his Praetor suit and begins picking up weapons, beginning with the pistol and combat shotgun. This level is divided into two sections; if this level is replayed after completing it, the player will skip the introductory area and start on the Martian surface.

"So you walk eternally through the shadow realms, standing against evil where all others falter. May your thirst for retribution never quench, may the blood on your sword never dry, and may we never need you again."

- Corrax Entry 7:17 (Loading description)

Mission 01: Rip & Tear
After waking up from his sarcophagus, the Doom marine quickly recovers his Praetor suit and tries to obtain information about the demonic invasion from a nearby computer; no information is available as the satellite array in Resource Operations needs to be realigned. Samuel Hayden, the facility's director, then makes contact via the computer and asks for the marine's help in finding a mutually beneficial solution; the marine responds by throwing the computer aside. As the marine enters the elevator to the Martian surface, Hayden makes contact again and accepts responsibility for the disaster that has overrun the facility but claims the risks and the human costs were necessary; after looking at a corpse in the elevator, the marine punches the comm panel to disable it. On the surface, the Doom marine fights his way past possessed scientists, soldiers and imps until he reaches the entrance to Resource Operations.

Objectives

 * Discover the Cause
 * Destroy the Gore Nest
 * Find the Site 03 exit
 * Find blue access key
 * Find the Resource Ops entrance

Introduction
After the cutscene ends, use the pistol you collected to kill the attacking possessed scientists then press the computer panel next to the door to activate an "echo recording". Once the recording ends, head through the door and collect the Praetor suit in front of you to trigger another cutscene; once it ends, head through the now-open doorway in front of you and follow the tunnel to some more possessed where you can practice glory killing to regain lost health. At the end of the tunnel, is a door with a dead guard under it; take the combat shotgun from the corpse then interact with the door to climb under it and find an imp that you can kill with your new weapon. In the next room is a gore nest surrounded by more possessed; kill them and interact with the gore nest to rip out one of its organs, which will cause a wave of imps to teleport in - the imps frequently climb up walls and ledges to get away from you, so be ready to chase them down. Once all the imps are killed and the lockdown is disengaged, head through the open door at the back of the room to find an elevator and press the button inside it to go up to the Martian surface.

Note that this tutorial section of the level is entirely skipped when replaying the level from the campaign menu, when playing on the Ultra-Nightmare skill level, and when playing in Arcade Mode.

Martian surface
Once the elevator reaches the surface, head forward until you drop down a hole then climb up the ledge in front of you to find the first datapad. Continue following the path until you drop into an area with a stone square block where you will find more possessed scientists and imps joined by possessed soldiers; these enemies carry energy blasters so keep moving to avoid their fire. Once all the enemies are killed, climb up to the metal walkway and head through a small doorway in front of you, where you will see that your route is blocked by a door requiring a blue access key. Turn right and follow a tunnel, then turn left and go down a slope to see a large gray crate in front of you; there is a corpse with blue overalls sitting against the crate which has the blue key you need.

Backtrack to the blue door and go through it; in front of you is a box containing frag grenades. Head forward to drop into an area with a large metal piston and kill some more possessed scientists, then turn left and follow the path down to a second piston which has more scientists next to it; watch out for imps appearing when you start killing the scientists. Turn left and head down some metal ledges until you reach a hover platform with some boxes on it, kill the imps that appear then climb on the boxes and turn right to jump to a wire fence with a small doorway in it. Go through the doorway and head round the piston in front of you, then climb up the yellow ledge ahead and follow the path to find your first combat support drone; after taking a shotgun modification from it, head between the rock columns in front of you and practice using your new mod on the imps and soldiers ahead. Follow the path up two short steps until you reach an enclosed area with imps and soldiers, then climb up to a ledge with a shield pickup to find an area with two broken railway tracks above you.

There are numerous scientists, soldiers and imps in this area so watch your surroundings carefully. Once the entire area is clear, stay at ground level and follow the path round to an area with a broken forklift truck then climb up two ledges to find an armor pickup; from here you should use the blue box on your left to climb up to track level, then head up the tracks to two large doors that will open as you approach. Go up the staircase behind the doors and walk past a holographic UAC Spokesperson to find a computer panel that you can press to finish the level.

Challenges
There are no challenges for this level.

Classic level
After passing the second piston you will head down to a hover platform guarded by imps. From the hover platform, turn round 180 degrees and look at the horizontal metal fence behind you to see that it has a small archway inside it; go through this archway and turn left to find a lever that will open a square door at the end of the path in front of you, which leads to the northern-most room from Doom II's. Possessed soldiers will appear on the ledges when you enter the room.

Special items
To find the automap station in this level, head through the blue door and drop into an area with a large metal piston, then turn left to see that the path splits in two with one path going down and another path going up into a tunnel. Follow the tunnel to a cavern containing a crane and kill all the possessed scientists, then look for the automap station next to a parked truck.