James Bond 007: Nightfire Cheats

First get to punch on weapons then walk up to a guard and punch them. 
If done without them raising the alarm then the guard will be
permanently how you say "knocked out" for the rest of the mission.

The first 007 icon can be found immediately after you use the Q-Smoke. It will be to the left when you are driving.
The second 007 icon is located after the truck blocks the path. Go up the stairs and it will be to your left.
The third 007 icon will be in the air when you jump the little stairway.
The last 007 icon can be found after you use your Q-Boost to get across the bridge.

To enable this code enter,

Car Missile Upgrade - LAUNCH

Press Start to pause game play, then hold L and press X, Y, B, White, X, Y, B, White, then release L.

Enter the code TRANSMIT

All multi-player options
Enter "GAMEROOM" at the cheats screen.
Assassination option
Enter "TARGET" at the cheats screen.
Demolition option
Enter "TNT" at the cheats screen.
Explosive Scenery option
Enter "BOOM" at the cheats screen.
GoldenEye Strike option
Enter "ORBIT" at the cheats screen.
Protect option
Enter "GUARDIAN" at the cheats screen.
Team King Of The Hill option
Enter "TEAMWORK" at the cheats screen.
Uplink option
Enter "TRANSMIT" at the cheats screen.
Charachters...
All characters
Enter "PARTY" at the cheats screen.
Baron Samedi
Enter "VOODOO" at the cheats screen.
Bond Spacesuit
Enter "ZERO G" at the cheats screen.
Bond Tuxedo
Enter "BLACKTIE" at the cheats screen.
Christmas Jones
Enter "NUCLEAR" at the cheats screen.
Drake
Enter "NUMBER 1" at the cheats screen.
Elektra King
Enter "SLICK" at the cheats screen.
Goldfinger
Enter "MIDAS" at the cheats screen.
Jaws
Enter "DENTAL" at the cheats screen.
Max Zorin
Enter "BLIMP" at the cheats screen.
May Day
Enter "PHOTON" at the cheats screen.
Nick Nack
Enter "BITESIZE" at the cheats screen.
Oddjob
Enter "BOWLER" at the cheats screen.
Pussy Galore
Enter "CIRCUS" at the cheats screen.
Renard
Enter "HEADCASE" at the cheats screen.
Scaramanga
Enter "ASSASSIN" at the cheats screen.
Wai Lin
Enter "MARTIAL" at the cheats screen.
Xenia Onatopp
Enter "JANUS" at the cheats screen.