While holding [Shift] and [Ctrl] during gameplay, type one of the following codes:
BZVEIW - Enemy always appears on radar
BZRADAR - Full map
BZBODY - Invincible
BZTNT - Unlimited ammo
BZFREE - Unlimited amount of scrap and pilots.
IMADIRTYCHEATER - Try it in mission select to load any level (doesn't work always)