Level skip (NTSC version)
Pause the game and enter the passport screen. Go to the "Exit To Title" page and press [Z], [Y], [Z], [Y], [X]x3, [Start]. Lara will make a sound to confirm correct code entry. Press [A] to skip to the next level.
Weapons (NTSC version)
Press [X], [Y], [X], [Y], [Z]x4, [Y], [Z], [Y], [X]x3, [Start] at the inventory screen. Lara will make a sound to confirm correct code entry. Then, enable the "Level skip" code and use it to advance to the end of the game. Then, begin a new game and activate the "Weapons" code, followed by the "Level skip" code again. All weapons in the game will appear in Lara's inventory.