The World Is Not Enough Codes -

Change gun options:
Hold B and press Z to change options on your gun. For example, you can make the Wolfram P2K have a silencer. Note: Every gun does something different.

Use gadgets:
Hold B and press A to use certain gadgets, such as nightvision. Note: This only works in certain levels such as Mission 6: Night Watch.

Civilian skins:
Successfully complete the City Of Walkways 1 level under the "Agent" difficulty setting with a time less than 3:35.

Classic skins:
Successfully complete the game under the "Secret Agent" difficulty setting to unlock Tuxedo Bond, Baron Samedi, Oddjob, Scaramanga, and Jaws.

Contemporary skins:
Successfully complete the game under the "Agent" difficulty setting to unlock Alec Trevlyan (006), Wai Lin, Max Zorin, May Day,and Christmas Jones (dress).

Covert skins:
Successfully complete the City Of Walkways level under the "Secret Agent" difficulty setting with a time less than 3:45.

Exotic skins:
Successfully complete the Cold Reception level under the "00 Agent" difficulty setting with a time less than 3:25.

Security skins:
Successfully complete the King's Ransom single player level under the "Secret Agent" difficulty setting with a time less than 3:45 to unlock the Security skins.

Scientist skins:
Successfully complete the Masquerade level under the "00 Agent" difficulty setting with a time less than 4:20.

Soldier skins:
Successfully complete the Midnight Departure level under the "Agent" difficulty setting with a time less than 3:05.

Suit skins:
Successfully complete the Curiour level under the "Secret Agent" difficulty setting with a time less than 2:00.

Air Raid scenario:
Successfully complete the Masquerade level under the "Agent" difficulty" setting with a time less than 3:15 to unlock the Air Raid multi-player scenario.

Capture The Briefcase scenario:
Successfully complete the Turncoat single player level under the "Secret Agent" difficulty setting with a time less than 3:20 to unlock the Capture the Briefcase multi-player scenario.

Castle scenario:
Successfully complete the Subway single player level under the "Agent" difficulty setting with a time less than 2:15 to unlock the Castle multi-player scenario.

Forest scenario:
Successfully complete the Night Watch single player level under the "00 Agent" difficulty setting with a time less than 2:20 to unlock the Forest multi-player scenario.

Sky Rail scenario:
Successfully complete the Cold Reception single player level under the "Secret Agent" difficulty setting with a time less than 3:15 to unlock the Sky Rail multi-player scenario.

Team King Of The Hill scenario:
Successfully complete the King's Ransom single player level under the "Agent" difficulty setting with a time less than 2:20 to unlock the Team King Of The Hill multi-player scenario.

Gadget War mode:
complete the Fallen Angel single player level under the "Secret Agent" difficulty setting with a time less than 2:45 to unlock Gadget War mode

Golden gun mode:
Successfully complete the game under the "00 Agent" difficulty setting to unlock the Golden Gun Scenario under the multi-player option. In this scenario, you must collect the three parts of the golden gun and kill all of your opponents with it to win.

Wildfire mode:
Successfully complete the City Of Walkways 2 level under the "Agent" difficulty setting with a time less than 3:00.