The UAC

The UAC is the first level of Doom (2016), and the player's first introduction to the UAC, Samuel Hayden, the demons, and the Doom Slayer. The mission that has you going through this level is called, quite appropriately, "Rip and Tear."

You awaken from your slumber to find yourself surrounded by the living dead, and after taking them out and reclaiming your battlesuit, you learn that a demonic invasion is underway on Mars, and that the UAC facility has been overrun by Hellspawn. Time to do what you do best.

You will get the Pistol and the Praetor Suit as you go through the introductory parts of this level, as well as get your first taste of Glory Kills before getting your hands on the Combat Shotgun. You will also get to know your first major enemies, Possessed, Possessed Soldiers, and Imps; which you will be contending with for a good portion of the game. You will also have to destroy your first Gore Nest, which summons lots of demons that you then have to kill before the lockdown will be lifted.

There are no Challenges for this introductory mission, but there are three secrets, one Elite Guard, and one Field Drone to find, as well as a lever which will grant you access to a classic Doom II map, Entryway.