Level Skip and Extra Lives
To skip to the next level, pause the game and press Start, A, B, Select, Right, Left, Left, Right, Select, B, A, B, B, A, then Start. If you enable this cheat when no submarines are left, you will also gain extra lives. This cheat can only be used once per game.
All Weapons
To get all weapons, pause the game and press Start, A, B, Select, Select, Select, Select, Select, then Start.
Double Points
For double points, pause the game and press Start, A, B, B, A, Right, Down, Up, Left, Left, then Start.
Instant Stopping
Pause the game and press Up, Down, Left, Right, then Select.
Slower automatic scrolling
To slow down the automatic scrolling, pause the game and press Up, Down, Left, Right, Up, Down, Left, Right, Up, Down, Left, Right, A, B, B, then A.
Disable automatic scrolling
To disable automatic scrolling, pause the game and press Up, Up, Down, Down, Left, Left, Right, then Right.
Pro Action Replay Codes
| Effect | Code |
|---|---|
| Unlimited Lives | 0000 B109 |
| Unlimited Armour | 0007 0C0F |
| Unlimited Power | 0005 3FDF |
| Unlimited Time | 0005 7028 |
| Unlimited Torpedoes | 0005 3B18 |
| Unlimited Missiles | 0005 3C0C |
| Unlimited Caterpillar Drive | 0005 4509 |
| Unlimited ECMs | 0005 4309 |
Game Genie Codes
| Effect | Code |
|---|---|
| Infinite lives | SXEZXZVG |
| Begin the game with 10 lives | ZEVLYAIE |
| Begin the game with 1 life | PEVLYAIA |
| Infinite time | SXEUPUVK |
| Begin the game with 10 horizontal torpedoes | ZANLVKPO |
| Begin the game with 50 horizontal torpedoes | ZLNLVKPP |
| Begin the game with 99 horizontal torpedoes | LTNLVKPP |
| Begin the game with 5 vertical torpedoes | IANUUKYA |
| Begin the game with 50 vertical torpedoes | ZLNUUKYA |
| Begin the game with 99 vertical torpedoes | LTNUUKYA |
| Begin the game with 5 caterpillars | IEELSKZA |
| Begin the game with 50 caterpillars | ZUELSKZA |
| Begin the game with 99 caterpillars | LVELSKZA |
| Begin the game with 5 ECMs | IEEUXKZA |
| Begin the game with 50 ECMs | ZUEUXKZA |
| Begin the game with 99 ECMs | LVEUXKZA |
| Infinite horizontal torpedoes | SXUXYSVK |
| Infinite vertical torpedoes | SZUZPVVK |
| Maximum power horizontal torpedoes on pick-up | OZEUEKOK + AAEUVGPA |
| Maximum power vertical torpedoes on pick-up | OZSLNKOK + AASUSGPA |