Star Wars Dark Forces Easter Egg - Cheat Codes (NOT AN EGG)

During gameplay quickly press left , o, x, right, o, x, down,o,x.This brings up a menu with options like invincibility, maxout (gives you all weapons and a gas mask), pogo (when you walk up to a wall with a ledge at the top, you are sent up to the top of the wall), game won (at the pause screen menu, you have the option of advancing to the next level), palmode (???????), and other cheat options.