Cheat mode:
Type dipstick to enable cheat mode:

Result - Code:

Flight mode - flyboy
Missile-cam view - ride
Bounce off everything - boing
Level select - goto
Jump to end of level - goarch
Enable fog - london
Disable fog - nodnol
Invincibility - toosad
Ultraviolent mode - ekg
Zoom mode - fun
God mode - chojin
Double pistols - johnwoo
MP40 gun - plugem
Bazooka - vanilla
Heat seeker missile gun - hottimes
Drunken missile gun - booze
Flame wall gun - bones
Fire bomb gun - firebomb
Kill all enemies - seeya
Keys, armor, health - sixtoys
Magic mushroom mode - badtrip
Elastic mode - boing
Restart level - goobers
Ouch mode - whack
Auto run - speed
Restore yourself to normal - panic
Enable light diminishing - dimon
Disable light diminishing - dimoff
Quit - gogates
Invincible to bullets - shootme
Invincible to fire - burnme
Gas mask - lungdung
Armor, keys, heatseeker, split missile - huntpack
Suicide - 86me
No floor or ceiling textures - gota386
Enable floor and ceiling textures - gota486
Re-enter level - reen
MP40 Gun - plugem
Display coordinates - where
Record a demo - record
Stop recording a demo - stop
Play a demo - play
Enable lights - shineon
Disable lights - shineoff
All keys - slacker
Dog mode - woof
Game jukebox - maestro
Split missile - split
Kinetic energy sphere - kesofdeath
Toggle missile camera - cujo
Full map - cartier