For the following codes, select the "Codenames" option at the main menu. Select your character, then enter one of the following codes at the "Secret Unlocks" screen. Save your Codename after entering the code. Then, exit your Codename and begin game play.

Code - Result:

PASSPORT - Level Select
TRANSMIT - Uplink Mode
GUARDIAN - Protection Mode
POWDER - Unlock Alpine Escape level
MELTDOWN - Unlock Alpine Escape level
BLASTOFF - Unlock Countdown level
AQUA - Unlock Deep Descent level
BONSAI - Unlock Double Cross level
TRACTION - Unlock Enemies Vanquished level
PARADISE - Unlock Island Infiltration level
HIGHRISE - Unlock Nightshift level
FLAME - Unlock Phoenix Fire level
Q LAB - All gadget upgrades
SHUTTER - Camera upgrade
SESAME - Decrypter upgrade
P2000 - P2K upgrade
AU P2K - Golden P2K
AU PP7 - Golden PP7
LIFTOFF - Grapple upgrade
PHOTON - Laser upgrade
ZAP - Stunner upgrade
GAMEROOM - All multi-player options
TNT - Demolition Mode
VACUUM - Unlock the Equinox Level
BOOM - Explosive Scenery in MP
TEAMWORK - Team King of the Hill in MP
SCOPE - Assassination Mode in MP
ORBIT - Goldeneye Strike in MP
BOWLER - Unlock Oddjob in MP
NUCLEAR - Unlock Christmas Jones in MP
MIDAS - Unlock Goldfinger in MP
CIRCUS - Unlock Miss Galore in MP
ASSASSIN - Unlock Scaramanga in MP
DENTAL - Unlock Jaws in MP
BLACKTIE - Unlock Tuxedo in MP
VOODOO - Unlock Baron Samedi in MP
MAGAZINE - Unknown
JANUS - Unlock Xenia in MP
BLIMP - Unlock Max Zorin in MP

On the Enemies Vanquished level, press Start to pause the game. Then hold L and press Right, Right, Left, Left, Up and release L. You can now drive the Shelby Cobra through the Alps and beat the enemy car.

While racing on the Enemies Vanquished level, press Start to pause game play, then hold L and press B(2), X(2), Y, then release L.

While racing on the Paris Prelude, Enemies Vanquished, Island Infiltration, or Deep Descent level, press Start to pause game play, then hold L and press X, Y, B, Y, X, then release L.

While racing on the Paris Prelude, Enemies Vanquished, Island Infiltration, or Deep Descent level, press Start to pause game play, then hold L and press X, Y(2), X, Y, B, then release L.

While racing on the Paris Prelude, Enemies Vanquished, Island Infiltration, or Deep Descent level, press Start to pause game play, then hold L and press X, B(2), X, then release L.

While racing on the Paris Prelude, Enemies Vanquished, Island Infiltration, or Deep Descent level, press Start to pause game play, then hold L and press B, Y, X, B(2), then release L.

While racing on the Paris Prelude, Enemies Vanquished, Island Infiltration, or Deep Descent level, press Start to pause game play, then hold L and press B, Y, X, B(3), then release L.

While racing on the Paris Prelude, Enemies Vanquished, Island Infiltration, or Deep Descent level, press Start to pause game play, then hold L and press B, Y, X, B(4), then release L.

While racing on the Paris Prelude, Enemies Vanquished, Island Infiltration, or Deep Descent level, press Start to pause game play, then hold L and press B(4), then release L. Note: This can also be done when you are flying the plane with Alura.

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

First u must go to code names and type in Green bond (must have space)

Enter "GAMEROOM" at the "Secret Unlocks" screen.

Enter "TARGET" at the "Secret Unlocks" screen.

Enter "TNT" at the "Secret Unlocks" screen.

Enter "BOOM" at the "Secret Unlocks" screen.

Enter "ORBIT" at the "Secret Unlocks" screen.

Enter "GUARDIAN" at the "Secret Unlocks" screen.

Enter "TEAMWORK" at the "Secret Unlocks" screen.

Enter "TRANSMIT" at the "Secret Unlocks" screen.

Enter "PARTY" at the "Secret Unlocks" screen.

Enter "VOODOO" at the "Secret Unlocks" screen.

Enter "ZERO G" at the "Secret Unlocks" screen.

Enter "BLACKTIE" at the "Secret Unlocks" screen.

Enter "NUCLEAR" at the "Secret Unlocks" screen.

Successfully complete the level to unlock the Ultralight card and Protection multi-player mode.

Successfully complete the level to unlock the Kiko card and Team King Of The Hill multi-player mode.

Successfully complete the level to unlock the Dominque card, Jaws and Renard in multi-player mode, and Missile upgrade

Successfully complete the level to unlock the Alura card and Demolition multi-player mode.

Successfully complete the level to unlock the Zoe Nightshade card, Oddjob and Baron Samedi in multi-player mode, and Pistol upgrade.

After completing the game, do not press any buttons. An ending sequence will start playing. It will play the credits, the ending sequence, and a bonus sequence about how the game was made will begin.

Turn fixed guns on in multi-player mode, then put the weapon set to Phoenix Weapon, or anything that has a remote mines. Next, put a bomb on a fixed gun. When the second person uses it, detonate it.

When you are low on sniper ammunition and people are not shooting at you, take out your sniper rifle. Zoom in on a non-moving target's head. Make sure to get as near to the target's head as possible. Then, switch to a handgun or another weapon that can be silenced. Silence the weapon, then shoot. Do not the move the cross-hairs when changing weapons. Then, target the next victim and repeat the process.

When someone throws a stun grenade in front of you, turn away from it and you will not be blinded.

When the Ronin is activated, you can press [Action] any time in front of the Ronin to close it up, then you can pick it up again. Note: It will be as if you had just picked it up for the first time.

If an enemy does not see you, point your gun at the back of their head. To get double the points, once they turn around with their hands in air, knock them out with a punch. If you look on your score board at the start menu, you should have one surrender and one subdue for the same person. Note: Some people will never surrender.