007: The World Is Not Enough

To Get Infinite Ammo:
At the start of the first level, press these buttons for all weapons: R, L + A + B, C-Up, C-Right + A + B, R + L, A + C-Left.
If done correctly, you  will hear a beep.
Shoot away!

Air Raid Scenario:
Beat the Masquerade level on the "Agent" difficulty" setting with a time less than 3:15 to open Air Raid in multi-player.

Capture The Briefcase Scenario:
Beat the Turncoat level on the "Secret Agent" difficulty setting with a time less than 3:20 to open Capture The Briefcase in multi-player.

Golden GunScenario:
Beat the game on the "00 Agent" difficulty setting to open the Golden Gun multi-player scenario.
In this scenario, you must collect the three  parts of the golden gun and defeat all of your opponents with it.

Sky Rail Scenario:
Beat the Cold Reception level on the "Secret Agent" difficulty setting with a time less than 3:15 to open the Sky Rail multi-player scenario.

Team King Of The Hill Scenario:
Beat the King's Ransom level on the "Agent" difficulty setting with a time less than 2:20 to open the Team King Of The Hill multi-player scenario.

Civilian Skins:
Beat the City Of Walkways 1 level on the "Agent" difficulty setting with a time less than 3:35 to open the Civilian skins.

Classic Skins:
Beat the game on the "Secret Agent" difficulty setting to open Tuxedo Bond, Baron Samedi, Oddjob, and Jaws.

Contemporary Skins:
Beat the game on the "Agent" difficulty setting to open Alec Trevlyan (006), Wai Lin, Max Zorin, May Day, and Christmas Jones (dress).

Covert Skins:
Beat the City Of Walkways 1 level on the "Secret Agent" difficulty setting with a time less than 3:45 to open the Covert skins.

Security Skins:
Beat the King's Ransom level on the "Secret Agent" difficulty setting with a time less than 3:45 to open the Security skins.

Scientist Skins:
Beat the Masquerade level on the "00 Agent" difficulty setting with a time less than 4:20 to open the Scientist skins.

Soldier Skins:
Beat the Midnight Departure level on the "Agent" difficulty setting with a time less than 3:05 to open the Soldier skins.

Suit Skins:
Beat the Curiour level on the "Secret Agent" difficulty setting with a time less than 2:00 to open the Suit skins.

Wildfire Mode:
Beat the City Of Walkways 2 level on the "Agent" difficulty setting with a time less than 3:40 to open wildfire mode.

Exotic Skins:
Cold Reception - 00 Agent in 3:05

Forest Multiplayer level:
Night Watch - 00 Agent in 2:20

Unlock "Castle":
To unlock this nice multiplayer level, you must beat the single player level called "Subway" on Agent mode, in uder the specified time of 2 minutes  and 15 seconds.
This will give you the castle level as a multiplayer map,  which is the largest map in the game!