Episode 1: Dimension of the Doomed

Nightmare Difficulty - To get there, go through the fourth episode and go into the pool backwards. Now swim forward to the wall before you fall through the bottom of the pool. You should now be sitting on the ledge that leads to the Nightmare level.

E1M1: The Slipgate Complex

1 - Forward and to the right of the start is a legde with flashing lights. Shoot the wall nearest the start on that ledge (the one with the red design on it). There will be a box of shells behind it. Also, the guys at id are nice enough to tell you to shoot this one if you try to use it.

2 - Underneath the first bridge you come to is a river. It flows into a cavern. Enter this cavern. Walk through the cavern. Around the time you pass by a set of steps containing a 100 health item and a door to the end of the level, the game will register a secret. At the end of the cavern is a lift taking you back up to the blue armor at the start.

3 - Past the first bridge is a door. Enter the door and kill the monsters. To the right of the entrance is a column and a ledge. Go to the corner between the ledge and the column. Shoot the globe texture high up on the column. A platform will rise and you will be on the ledge. Turn to your right and shoot the globe texture on the ledge. The wall behind the globe will open, leading to a quad damage item.

4 - To the left of the door past the bridge is a large hall. Follow it to the right. There is a large, shallow pool of slime and a button on the wall. Push the button and a platform will slide out from the wall. Halfway across the platform, turn to your left. There will be a red target in a depression slightly above your the level of your head. Shoot it and turn to your left. A door in a wall will open, revealing a double barreled shotgun.

5 - Past the platform over the pool is a door. Go through the door and head forward and to the right. Go down the walkway and turn left. Go down the walkway again and turn left. There will be a button and a light in front of you. Jump onto the bannister. Jump onto the light. Either step or jump onto the button (sometimes you fall off when you step, but jumping is very difficult). Look at the wall in front of you. There will be a ledge and two blocks jutting out. Jump to the lowest block. Jump up to the next block and to the ledge. Inside is a 100 health item.

6 - Go all the way down the walkway. There will be a door. To the right and behind a column will be a biosuit. Take it. You can't dawdle now, as the biosuit doesn't give you much more time than you need. Jump into the slime. Swim underneath the door. Follow the tunnel to where it opens into a slightly larger area. There will be a platform overhead. Swim up an opening in the platform. If you are running low on air, you can swim up to the platform from the tunnel, but you must step over the opening before the game registers the secret. There should be a latform with a yellow armor and some health on it. There is also a slipgate to the area over the door past the bridge (back around secret #3)


Episode 1
E1M1
E1M2
E1M3
E1M4
E1M8
E1M5
E1M6
E1M7

Episode 2
Episode 3
Episode 4
Mission Pack 1
Mission Pack 2