N2O: Nitrous Oxide (PlayStation)

GameShark, Pro Action Replay, Xploder, and Xplorer Codes

Note:
A GameShark or Pro Action Replay cartridge is required to use the codes featured below.

North American (NTSC) version

Official codes from InterAct.
Codes from Game Shark Users.
Codes from The Game Shark Code Creator's Club.

European and Australian (PAL) versions

Unlimited lives player 1:
8011B354 0103