Men In Black Codes -

Cheat mode:
Press [Esc] during game play to return to the main menu. Repeatedly type dougmatic until the menu disappears. Press [Esc] to enable cheat mode. Then, enter one of the following codes to activate the corresponding cheat function.

Effect	Code
All weapons	giveme
Unlimited ammo	loadme
Full health	healme
Invincibility	protectme
Saved games have all locations	moveme
Kill everything on level	killem
Return to headquarters	hq
Arctic level	arctic
Amazon level	amazon
Underground level	undergnd
Temple level	temple
Skip Frales' estate	frales
Switch agent	agent

Remove sunglasses:
Press G while playing any MIB agent except for Laurel.