Here are the cheat codes:
allen = radiation suit
mikekoenigs = all weapons
marybregi = invisible (worthless)
charlesjacobi = no clipping
joshuastorms = lights up dark places
davidbrus = invincible
scottholman = all keys and zorch
Go to level 2. Type scottholman for all keys. Go to one of the rooms with an elevator(I forgot which one). While you're going up the elevator, try to get on the crate. Open the secret door in the wall and you'll find a surprise: a secret room with the... more
1. Get to level 2.
2. Type scottholman to get all keys
3. Go through one of the doorways that have a stair case that goes down.
4. Go through the door, and transport to the refridurated storage. There are two different sets of stairs going to a... more
On the first level of the first episode, where you are first spawned, there should be a nearby door and when opened it reveals a dead end. Press the open door button (on the keyboard) by one of the walls. You will be teleported to a room with pictures... more