For the demo
------------
During the game
NUM LOCK     = Invulnerability

Command line parameters for TEKD1.EXE
(ie TEKD1 NOENEMIES to start the game)
NOENEMIES    = Removes everyone but you
NOGUARD      = Removes the guards from the game.
NOCHASE      = Removes the shooting enemies from the game.
NOSTROLL     = Removes the innocent bystanders from the game.

For the full game
-----------------
ALT+SHIFT+G  = Invulnerability
ALT+SHIFT+W  = All weapons, lots of ammo, and all keycards.
ALT+SHIFT+J  = All matrix symbols that you would normally collect by
               killing the bosses.

    Source: geocities.com/timessquare/dungeon/4577

               ( geocities.com/timessquare/dungeon)                   ( geocities.com/timessquare)