Complete the game with the best ending. Allow the credits to complete and an intermission sequence will begin.
End Current Mission
Hold [Left Shift] and press [Keypad Minus] at the gameplay screen. Release those keys and enter this code: endmission
Invincibility
This glitch may be present only in the demo version of the game. Before the end of the level, just when the helicopter picks you up, wait about five seconds. Then, go to your action menu by pressing ] or [ and select "Eject." Press [Enter] and your character will parachute out of the helicopter. When he lands, you can continue the game and not get killed.
Save Game
Hold [Left Shift] and press [Keypad Minus] at the gameplay screen. Release those keys and enter this code: savegame
Show Elevations on Map
Hold [Left Shift] and press [Keypad Minus] at the gameplay screen. Release those keys and enter this code: topography
Unlimited Ammunition
Reload before you run out of shots on one clip.
Unlock All Missions
Hold [Left Shift] and press [Keypad Minus] at the main menu screen. Release those keys and enter this code: campaign
