At the Mission computer press ctrl+F1 .
            
 Then You can enter one or more of the following codes. 
 All the codes are case sensitive !!! Correct codes will
 be confirmed by a beep. 
 
 Here are the codes:
             
 Redtop Trod - Select all single player missions from the mission Menu.
 Half Libel - Activates Teleport key.
 Had A Nude On - Activates Invincibility key.
 Brass Clue - Activates Amunition Key.
 Mother Mourn Us - Changes mountain on mission 1-5 to Mt. 
 Rushmore with programers faces.
 Chaste Coed - View the end video sequences.
 Rotted Drop - Activates Destroy Target.
 Horny Elk Leer - Activates all targets on radar key.
 O'Sarge - Gives Seargeant in training missions an Irish accent.
 Swiss Throat - Changes Citadel building into 7th level headquarters.
 RANGE GOES GORY - All Levels, and lots of other stuff
 DUNK IT HERE - Recording Session Outtakes
 OH NO! LESS JAPAN - Activates Ion-Strike Key
 A Scramble On - Let's you take screen shots by pressing 
 SHIFT-CTRL-RIGHT CLICK.
             
 In-Game-Keys:
 CTRL+I   - Activates Invinciblity
 CTRL+Z - Refills ammo
 CTRL+F - Destroy current target
 CTRL+B - Teleport Behind Target
 CTRL+P - All targets on radar

 
 Photo Gallery: 
 Type "Swiss Throat" in the cheat code box and it changes the 
 Citadel building in mission 2-6 to 7th Level Headquarters and 
 inside are the pictures of the programers. Hit TAB to cycle 
 through them. 

 
 Pick a Ship:
 If you use a gashr on any occupied ship, the pilot will come out. 


 Unlimited passengers
 You must have a vehicle that holds passengers for this trick. First, go to controls, 
 switch the eject passenger control on the 2 3 4 boxes to "D", and save it on all 
 modes Start any type of game and get a passenger. When you press D, you will 
 have unlimited passengers, but the passenger has to be in a different vehicle. For 
 example, if you are driving the Scorp Tank and do the trick, you make your 
 passenger in a guard tower, and he will stay there. If they are not in a vehicle, 
 they will disappear. If you press D again when one of the passengers die (are 
 ejected), then all the extra people will be killed.