Spear Of Destiny

Start the game with

SPEAR -debugmode [Enter]

In the game press [Alt]+[Shift]+[Backspace] so you can use the same cheat-keys as in Wolfenstein 3D.

Also: [L]+[I]+[M] might work ... giving you some items but stealing your points.

Also: In most Apogee (Id ?) games -including this- if you add to the commandline TEDLEVEL and a number you will start on that level.

Also: On older versions, type JOSHUA.

Easter Egg !!! (on some versions) :
Go "Change Screen Size". Press and hold [I]+[D]+[Esc].
Or: On the opening screen press [M] for a jukebox. (Information from Cheat Machine)