Assassination Mode
     Enter SCOPE as a code to unlock Assassination Mode.

Explosive Scenery
     To make the scenery, well, explosive, enter this code: BOOM.

Extra Ammo
     Enter MAGAZINE for a "high-power rifle".

Level Select
     Enter PASSPORT as a code to unlock all of the levels in the game.

Protect Mode
     Enter GUARDIAN as a code to unlock Protect Mode.

Team King of the Hill Mode
     To unlock Team King of the Hill Mode, enter this code: TEAMWORK.

Uplink Mode
     Enter TRANSMIT as a code to unlock Uplink Mode.