DOOM – Toxin Refinery

Access the Map

Near the start of the mission, after the first Trial Stone, search behind the barrels on the left platform to find a lever. Activate it, proceed into the next facility, and collect the Rocket Launcher. The Classic Map is accessed through the opening on the right.

Map Strategy

Toxin Refinery requires a blue key to complete the level, while a yellow key provides access to a secret area. A switch near a second blue door is tucked into a corner, but it’s visible through the window. Search in the middle of the computer room for the yellow key. This room has two secret passages. Return to the second step before the room and then quickly get on the left lift. When exiting that area, run for a second lift in the back. This gets you a Mega Health and Rocket Launcher. More secrets can be found from this second room by cutting through the toxin. After a short outdoor area, grab the blue key from its perch, but beware of an ambush. Return to the blue door and follow the path to the exit. There’s another exit if you cross the raised path at the start of the map.