Level 1
Slipgate Complex

Level 2
Castle of the Damned

Level 3
The Necropolis

Level 4
The Grisly Grotto

Level 5
Gloom Keep

Level 6
The Door to Chthon

Level 7
The House of Chthon

Secret Level
Ziggurat Vertigo

You begin this level high above a room. An ogre patrols the floor below. Rather than hop off to do battle, you can easily pick him off from your current position. Jump off the platform or ride the lift on the right-hand side.

There are several paths leading from this central area, including a locked door (which requires a golden rune key to open), a lava pit, a pitch-black room (beneath your original platform), and a dimly lit room. The dark room is filled with shooting spikes, so you really only have one choice. Step on the trigger tile in the center of the room, and head into the area that's left of the platform.

Weird: An unguarded room filled with power-ups. Wonder what's behind those doors...

A pair of ogres awaits you. Destroy them and move forward. (The other route is currently blocked.) Push the wall-mounted emblem to open a doorway to your right. Inside this room is a suit of armor. Take it, then press the emblem at the end of the walkway to release another pair of ogres, and to open a pit in the center of the walkway. Hop in.

After battling some more ogres, go up the stairs to collect the power-ups and ammo, then go back down. When you enter the hallway, you'll see a spiked wall on your left. As you start down the hallway, an ogre pops out of a panel. Kill him, grab the 100 health bonus at the end of the hall, spin around, and dart through the opening on the left wall. An elevator takes you to an upper platform where you can collect several power-ups, ammo, and a silver rune key.

Step through the teleport panel to return to the central area. The previously-black room is now illuminated. Make a running jump over the narrow grillwork, then battle the ogre platoon on the other side.

Shoot the symbol...

It's extremely dangerous to attempt to battle three ogres at once. A safer approach is to quickly kill the one that's dead ahead, then duck into his alcove.

The new area contains several health kits and ammo crates. The action starts as soon as you press the emblem on the wall.

Arm your grenade launcher, and beat a hasty retreat out of the room. You'll find it easier to eliminate the zombies from that vantage point than if you try to tackle them head-on.

...to reveal this lift platform

Secret Area 1
Press the emblem and a new symbol on a pillar in the zombie room is revealed. When you shoot it the stairs move back, revealing a crate of ammo.

Secret Area 2
Turn around and walk through the teleporter at the bottom of this alcove. A 100 health bonus can be found across the chasm - make a running jump to reach it.

Jump down, go through the pair of steel doors, and stomp on the floor trigger. This releases a platform that leads to the golden rune key (in the lava-filled room at the start of the level). Exit and walk through the new teleport panel, which takes you back to your original platform.

Listen carefully and you'll hear the sound of an ogre stomping around below you. Pick him off from the safety of your platform, then jump down.

Fetch the golden rune key, then spin around to battle the fiend. If your blast knocks it off the walkway, the lava will finish the job for you. Now you can finally open the locked door at the start of the level. Press the symbol on the wall to gain access to the room at the end of the hallway.

When the spiked door slides by, step into the hallway and walk through the teleport panel.

Secret Area 3
This one's totally obscure. From the start of the level, go into the room on the left, continue into the hallway, turn right, walk to the end, turn left, and look up. There's a symbol embedded high in the wall. Shoot the symbol to open a secret panel in the wall on your right. Ride the lift up to the rafters, then walk around until you find a safe spot to drop onto the lower rafters. You'll find a Quad Damage power-up there.

Secret Area 4
If you've already destroyed the shambler and found the level's exit, you may be asking yourself two questions: First, where are the last few monsters? Second, how do I reach the power-ups that were previously guarded by the ogres in the room with the pop-up wall panels? The answers lie in finding the following secret.

Return to the room where you encountered the ogres (the one with the pit in the center of the floor), and drop into the pit. As you watch, the spiked wall will move past the doorway. Enter the hallway, turn left, and walk through the teleport panel. Grab the goodies, defeat the scrags, then leap into the closest ogre's panel on the right side of the room below.