MAP13: Dark Citadel (Doom 64)

MAP13: Dark Citadel is the thirteenth level of Doom 64. It is easily one of the most eerie levels in the game in regard to the demonic architecture and creepy ambience by way of much of the stage being very dark and containing creepy BGM. Not the toughest level, but one that can make you jump more so than others. You will find yourself getting randomly ambushed by demons, hell knights, and barons throughout the level. This stage uses the starry skyline from the earlier 7 stages.

Boxes of shells and bullets are plentiful, so do not hesitate to make use of them. Be prepared though, as there are lots of enemies in various locations.

Secrets

 * 1) Leave the small room you begin the level in, then turn left and walk all the way down this hallway (the one with the orange moving thing all the way down the right side), killing any enemies as you go and ignoring the orange doorway on your left. Before you turn right at the end of the hall though, look at the walls in the corner, they are a different texture then the rest of the walls. Examine them and they open, revealing an alcove with shells, rockets, cells and a backpack.
 * 2) Again, from the start of the level, leave the small room, but this time go straight instead of turning left. Proceed a short ways until you come to an orange doorway on your right and go through. In this yellowish room, take a left and you will pass by a pillar with a gargoyle on it attached to a fence. Stop before you enter the next room with the wire fences all around it. Examine the left wall in the little room that attaches the two rooms with the fences, and it will rise up, revealing a hidden passage with a Mega Sphere and a BFG 9000!