Phobos Anomaly (Doom 2016)

Phobos Anomaly is a classic level from Doom (2016). It is a recreation of Doom's that includes enemies from the later game, but retains the original game's pickup and decoration sprites.

This level is unlocked after finding one of its rooms hidden in the Titan's Realm stage. Once unlocked, the full level can be played from the "Classic Maps" tab in the Campaign menu.

Essentials
In this level you start with the pistol, chainsaw, combat shotgun, chaingun and rocket launcher.

Press the button in front of you to reveal a room containing several pinkies surrounded by barrels. Quickly blow up the barrels to get rid of the pinkies then turn left and go down a staircase to a silver door which has a green armor behind it, as well as two antechambers containing more pinkies along with a shotgun, chaingun and boxes of bullets and shells. Continue on to a brown tunnel and press the button at the end to lower a lift which will take you up to a star-shaped arena; as you step off the lift two barons of Hell will appear in front of you, and killing both enemies will lower the walls of the arena revealing a large outdoor area. Jump off the furthest point of the star to find a switch and press it to raise a set of stairs, then go up and step on the marble pentagram at the top to finish the level.

Other points of interest
Step into the alcove at the back of the starting room, and a platform will take you up to a box of bullets and several stimpacks.

Secrets

 * 1) Near the bottom of the staircase leading to the silver door, look closely at the right-hand wall to see that it is slightly darker than the rest of the wall. Open this section to reveal a supercharge (AKA mega health).