At the Main Menu, highlight New Game, hold L + R and press Right.
Second Chapter
At the Main Menu, highlight New Game, hold L + R and press Down.
Special features
At the inventory screen, highlight the Timex-TMX. Hold Y until Secrets says 36/36. Quit the game and find a new option at the main menu.
Third Chapter
At the Main Menu, highlight New Game, hold L + R and press Left.
Typical Message
Place your Tomb Raider: Chronicles Dreamcast disc in to your PC-CDROM drive. You will find a typical message that states "Maybe some cheats will go here".
Fourth Chapter...