Cheat Mode
Press Start during game play to view the sonar screen. While at the sonar screen press Right, 1, 2, 1, 2, Down, 2, Up to display a new menu with cheat options including invincibility.
Level Codes
Medusa Bay QMBRB
Undercaves AGCFU
Ridgewater VADJR
Open Ocean QYEKR
Cold Water IAFWN
Deep Water YAHWV
The City of Forever, 1 OKBKI
Origin Beach CCRIJ
Dark Water WGUKK
The City of Forever, 2 MEMSK
The Tube GGWAO
The Machine KOWMP
The Vortex WCSKQ