IDDQD = Invincibility
                     IDKFA = All weapons, All keys, 200% armor
                     IDFA = Same as above but without the keys
                     IDCLEV + (episode #) + (level #) = Warp 
                     to any episode & level
                     IDCLIP = Walk through walls
                     IDDT = While in "map mode" reveals entire 
                     map
                     IDCLIP = Walk through walls
                     IDBEHOLD + I = Invisibility
                     " " + S = Berserk pack
                     " " + V = Invulnerability
                     " " + R = Radiation suit
                     " " + L = Light amp goggles
                     " " + A = Computer area map
                     IDCHOPPERS = CHAINSAW
                     IDMYPOS = COORDINATES
                     IDSPISPOPD = Clipping toggle
                     IDMUS## = PLAY MUSIC OF A LEVEL 
                     In deathmatch net game, hold Alt and type
                     IDDTIDDTIDDTIDDT  to see your opponent on 
                     the map screen.