Menacing Underworld

Menacing Underworld is a Single Player level in Q2. This level is almost identical to Entering Eternal Fire, the only difference is in regards to texturing.

Walkthrough
Turn left and collect the Rockets. Go through the doorway in front of you. Enter the doorway on your left and kill the Rottweiler. This room makes up the end of a long hallway filled with doorways. Exit the room and enter the first doorway to your left. Kill the Grunt and collect the 2 Rockets. Ignore the other doorway in the room and instead return to the corridor. Kill the Grunt and continue to the doorway on your right. Eliminate the 2 Grunts and collect the 2 Rockets. Return to the corridor and go to the next doorway on the left. Kill the Rottweiler and Grunt while collecting the Rockets and Grenade Launcher. Return to corridor and proceed to the next doorway on the right while collecting the 25 Health. Kill the Grunt and Scrag, then return to the corridor. Enter the next doorway on the left and kill the Grunt and Rottweiler. Ignore the doorway on the other side of the room and instead return to the corridor. Enter the next doorway on the right and kill the Ogre. Return to the corridor and enter the next doorway on the left. Kill the 2 Grunts and the Scrag while collecting the Super Nailgun. Ignore the doorway on the other side of the room and instead return to the corridor. Collect the Yellow Armor and proceed up the corridor to the next door on the right. Kill the 2 Grunts, then return to the corridor. Proceed to the first pair of doorways. Enter the doorway on the left to kill 3 Rottweilers. Ignore the doorway on the opposite side of the room, and instead cross the corridor and enter the room on the opposite side. Kill the 2 Grunts and collect the 2 Rockets. Return to the corridor and proceed to the end, the second pair of doorways. Enter the right room and kill the Grunt and Rottweiler while collecting the 2 Rockets. Return to the corridor and enter the doorway on the opposite side. Kill the Grunt and the Rottweiler, then enter the doorway on the opposite side of the room. Turn around to see that you are in another corridor, much like the first, with the doorways on the left side being the rooms you already entered with the previously ignored doorways. This means you should only pay attention to the doors on the right side. Enter the doorway directly across from the one you just entered the corridor from and kill the Ogre, then return to the corridor. Continue to the next doorway and kill the 2 Grunts within before returning to the corridor. Continue to the next doorway and kill the Ogre while collecting the 2 Rockets. Proceed to the next doorway and enter into the room. Kill the 2 Grunts and the Rottweiler while collecting the 2 Rockets. Continue to the next doorway and kill the Fiend while taking the 25 Health. Return to the corridor, kill the Grunt in the hallway, and continue to the next doorway. Enter the room, kill the Grunt and return to the corridor. Continue to the next room and kill the 2 Grunts inside. At the end of the corridor is a doorway leading to a small room, the doorway to the left leads back to the first left room of the first hallway.