Example on how to enter the following codes:

L Button + Down
R Button + C-Right
L Button + R Button + Down

To enter the above example, you would hold L and press Down on the 
D-Pad. Release both and hold R, then press C-Right. Release both and
hold L + R, then press Down on the D-Pad.

During gameplay, enter the following:

Invincibility:
L Button + Down
R Button + C-Right
R Button + C-Up
L Button + Right
L Button + C-Down
R Button + C-Up
L Button + Right
R Button + Down
L Button + Left
L Button + R button + C-Right

All Guns:
L Button + R Button + Down
L Button + C-Left
L Button + C-Right
L Button + R Button + C-Left
L Button + Down
L Button + C-Down
R Button + C-Left
L Button + R Button + C-Right
R Button + Up
L Button + C-Left

Maximum Ammunition (not infinite)
L Button + R Button + C-Right
R Button + Up
R Button + Down
R Button + Down
L Button + R Button + C-Right
L Button + R Button + Left
R Button + Down
R Button + Up
L Button + R Button + C-Right
R Button + Left

Line Mode
R Button + C-Down
L Button + R Button + Down
L Button + Right
R Button + C-Up
L Button + R Button + C-Right
R Button + Up
L Button + Down
L Button + Right
R Button + C-Left
R Button + C-Up

Invisibility
R Button + C-Left
L Button + R Button + C-Up
L Button + R Button + Left
L Button + R Button + Up
R Button + Up
L Button + C-Left
R Button + C-Up
L Button + C-Down
L Button + R Button + Left
R Button + Right

Invisibility in Multiplayer
L Button + C-Up
L Button + R Button + C-Left
R Button + Up
L Button + C-Right
R Button + C-Left
L Button + Right
L Button + R Button + C-Left
L Button + C-Right
L Button + Up
L Button + R Button + C-Down

At the Mission Select screen, enter any of the following:

Unlock Facility
L Button + R Button + C-Up
R Button + C-Left
L Button + Left
R Button + C-Up
L Button + Left
R Button + C-Down
L Button + C-Right
R Button + Right
L Button + R Button + C-Up
L Button + Right

Unlock Runway
L Button + R Button + Left
R Button + Left
L Button + C-Up
L Button + Left
R Button + C-Up
R Button + C-Down
R Button + C-Right
R Button + Right
L Button + Down
R Button + C-Left

Unlock Surface I
R Button + C-Left
L Button + R Button + C-Up
L Button + Left
R Button + Up
R Button + Left
L Button + Up
R Button + C-Down
L Button + Right
L Button + C-Right
L Button + R Button + Down

Unlock Bunker I
L Button + C-Down
R Button + Right
L Button + C-Right
R Button + C-Left
L Button + C-Down
L Button + R Button + Left
L Button + C-Right
L Button + R Button + Up
R Button + C-Right
L Button + Up

Unlock Silo
L Button + Up
R Button + C-Down
L Button + Left
R Button + Down
L Button + C-Left
L Button + R Button + C-Right
L Button + C-Up
R Button + Right
R Button + Right
R Button + C-Right

Unlock Frigate
R Button + C-Up
L Button + Down
R Button + C-Right
L Button + Left
L Button + R Button + Up
L Button + R Button + C-Down
R Button + C-Right
R Button + Up
L Button + R Button + C-Down
R Button + Up

Unlock Surface 2
L Button + C-Down
L Button + R Button + C-Right
R Button + C-Right
R Button + C-Up
R Button + C-Left
L Button + Right
L Button + R Button + C-Up
L Button + C-Up
L Button + R Button + Down
L Button + C-Right

Unlock Bunker 2
L Button + Down
R Button + Down
L Button + R Button + C-Up
L Button + Left
L Button + R Button + Right
L Button + C-Left
R Button + Right
L Button + C-Up
L Button + Left
L Button + C-Down

Unlock Statue
L Button + R Button + C-Down
L Button + R Button + C-Down
L Button + Right
L Button + R Button + Left
R Button + Left
R Button + C-Right
L Button + R Button + Left
R Button + C-Up
R Button + C-Down
R Button + Right

Unlock Archives
R Button + Left
L Button + R Button + Up
L Button + R Button + C-Down
R Button + Left
L Button + R Button + C-Right
L Button + Left
L Button + R Button + Right
L Button + R Button + C-Down
L Button + Up
R Button + C-Down

Unlock Streets
L Button + R Button + C-Left
L Button + C-Right
L Button + Up
L Button + R Button + C-Down
R Button + C-Right
R Button + C-Down
R Button + Left
R Button + C-Down
R Button + C-Up
L Button + Down

Unlock Depot
L Button + Down
L Button + Down
R Button + C-Down
L Button + C-Right
L Button + R Button + Right
R Button + C-Left
L Button + Down
L Button + C-Left
L Button + C-Right
L Button + Up

Unlock Train
R Button + Left
R Button + C-Down
R Button + C-Right
L Button + R Button + Left
L Button + Right
R Button + C-Down
L Button + Left
L Button + R Button + C-Left
L Button + Up
L Button + C-Up

Unlock Jungle
R Button + C-Down
R Button + Left
L Button + R Button + Up
R Button + Right
R Button + Down
R Button + Down
R Button + Up
R Button + C-Left
R Button + C-Up
L Button + R Button + Left

Unlock Control Center
L Button + C-Down
R Button + Down
L Button + Right
R Button + C-Right
R Button + C-Down
R Button + Left
R Button + Left
R Button + C-Up
R Button + Left
L Button + R Button + C-Up

Unlock Caverns
L Button + Down
R Button + C-Down
L Button + R Button + Up
L Button + Right
R Button + C-Up
R Button + C-Left
R Button + Up
L Button + C-Left
L Button + Up
R Button + C-Left

Unlock Cradle
L Button + R Button + C-Up
L Button + Left
R Button + Down
L Button + Down
L Button + C-Up
L Button + Down
R Button + Right
R Button + C-Up
L Button + C-Left
R Button + Right

The following cheat activation codes must be entered on the Cheat
Menu. If you enter the code correctly, you will hear a beep. Exit the
Cheat Menu, then return to the Cheat Menu for the new cheat to appear.

Activate Paintball Cheat
L Button + Up
C-Up
R Button + Right
L Button + R Button + C-Left
L Button + Up
R Button + C-Down
L Button + C-Down
L Button + R Button + C-Down
L Button + R Button + Up
L Button + C-Down

Activate Invincibility Cheat
R Button + Left
L Button + Down
Left
Up
Down
R Button + C-Left
L Button + C-Left
L Button + R Button + Left
L Button + R Button + Right
L Button + C-Left

Activate DK Mode Cheat
L Button + R Button + Up
C-Right
R Button + Left
R Button + Up
Up
R Button + Right
Up
L Button + R Button + C-Down
L Button + R Button + Down
L Button + R + C-Left

Activate 2X Grenade Launcher Cheat
R Button + Down
R Button + Up
Right
L Button + R Button + C-Down
L Button + Right
R Button + Left
Left
Down
Up
R Button + C-Down

Activate 2X Rocket Launcher Cheat
R Button + Right
L Button + Up
Down
Down
R Button + C-Down
L Button + Left
L Button + C-Left
R Button + Up
R Button + Down
R Button + C-Left 

Activate Turbo Mode Cheat
L Button + Down
L Button + C-Down
L Button + R Button + Up
R Button + C-Down
Left
R Button + Down
L Button + C-Down
Up
R Button + Down
L Button + Right

Activate No Radar Cheat [Multi]
R Button + Up
C-Down
C-Left
C-Up
L Button + Down
R Button + Up
C-Left
Right
R Button + Left
R Button + Right

Activate Tiny Bond Cheat
L Button + R Button + Down
R Button + Down
L Button + C-Down
Left
R Button + C-Left
L Button + R Button + C-Down
Right
Down
R Button + C-Down
R Button + Right

Activate 2X Throwing Knives Cheat
R Button + C-Left
L Button + Left
Up
L Button + R Button + Right
Right
L Button + R Button + C-Left
L Button + R Button + C-Left
R Button + Down
R Button + Left
R Button + C-Left

Activate Fast Animation Cheat
L Button + C-Down
L Button + C-Left
C-Down
C-Right
C-Left
L Button + R Button +Right
C-Right
L Button + R Button +Up
R Button +C-Left
L Button +Left

Activate Bond Invisible Cheat
L Button + R Button + C-Left
L Button + R Button + C-Down
L Button + C-Left
R Button + C-Left
R Button + Right
L Button + R Button + Left
L Button + Right
Left
L Button + R Button + C-Left
L Button + Down 

Activate Enemy Rockets Cheat
L Button + R Button + C-Down
C-Left
R Button + C-Down
C-Down
C-Down
L Button + R Button + C-Down
L Button + R Button + Up
C-Down
R Button + Up
L Button +Up

Activate Slow Animation Cheat
L Button + R Button + Left
L Button + R Button + Left
L Button + R Button + Down
L Button + R Button + Left
C-Right
L Button + R Button +Down
L Button + R Button + Down
L Button + Down 
C-Left
C-Up

Activate Silver PP7 Cheat
L Button + Left
L Button + R Button + Up
L Button + Right
L Button + R Button + Up
L Button + R Button + C-Left
L Button + R Button + Left
L Button + R Button + Down
C-Down
L Button + R Button + Right
L Button + R Button + Left 

Activate 2X Hunting Knives Cheat
R Button + C-Down
L Button + Right
R Button + C-Left
R Button + Right
L Button + R Button +Right
L Button + R Button + Up
L Button + Down
R Button + Left
L Button + Right
L Button + C-Left

Activate Infinite Ammo Cheat
L Button + C-Left
L Button + R Button + Right
C-Right
C-Left
R Button + Left
L Button + C-Down
L Button + R Button +Left
L Button + R Button +C-Down
L Button +Up
C-Right 

Activate 2X RCP-90s Cheat
Up
Right
L Button + Left
R Button + Down
L Button + Up
L Button + C-Left
L Button + Left
C-Right
C-Up
L Button + R Button + Down

Activate Gold PP7 Cheat
L Button + R Button + Right
L Button + R Button + Down
L Button + Up
L Button + R Button + Down
C-Up
R Button + Up
L Button + R Button + Right
L Button + Left
Down
L Button + C-Down

Activate 2X Lasers Cheat
L Button + Right
L Button + R Button + C-Left
L Button + Down
R Button + Left
R Button + Down
L Button + Right
C-Up
Right
R Button + Right
L Button + R Button + Up

Activate All Guns Cheat
Down
Left
C-Up
Right
L Button + Down
L Button + Left
L Button + Up
C-Left
Left
C-Down

Aztek Complex
L button + R button + up                    
L button + R button + C-right
L button + down
R button + right    
R button + up
L button + down
L button + left
L button + C-right
L button + R button + C-right
L button + left

Submitted by Jon