Doom 2 Cheats

Just type this when u play!

Beating the last guy- The last guy in the game is a big skull with a hole in its head exposing its brain. Through its brain it fires stuff out which resurrects dead demons on the board (There are many of them there). To beat the monster, you have to move up to the top platform and activate this skull wall so that a tower rises in front of the end boss. Next go down and get on the tower by pressing the space-bar on it and lowering it. Get on top of it and ride it upwards, firing at the end boss trying to hit his exposed brain. Also, remember to take out the demon firing rockets just below the skull. Note: This board is almost impossible to beat without using god mode (IDDQD).

When you are in the room at the start pick up the rocket luncher before you enter the teleport.
When you get out go up the top & hit the switch that makes the lift come up.
Go down @ get on the lift. When it is going up fire a rocket into the big demons brain it will make a loud noise if you get the rocket in.
Do it about 3 times and the demon will die. Another way to do it is to type in idclip and walk into the demon you will be in a small room with a head on a stick, shoot the head and the level ends.