All levels complete:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), Square,
X(3), Square, Triangle(3), Square, X(3).

Extra continues:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), R2(3),
L2(3).

Extra gold:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), R1, R2,
L1, L2, R1, R2, L1, L2.

Add tablet piece:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), L1, L2,
L1, L2, Square, Circle.

Disable fines:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2),
Circle(2), R2, R1,
L2, L1.

Unlimited air:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2),
Circle(2), Triangle, Circle, X, Square, Up, Right, Down, Left.

Unlimited health:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2),
Circle(2), Triangle(2), X(2).

Full air and health:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2),
Circle(2), Up, Down, Left, Right, X(2).

Unlock all doors:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2),
Circle(2), X, Circle, Triangle, Square.

Swim through obstacles
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2),
Circle(2), Square, Square, Circle(2). Note: Items may not be collected while
this code is enabled.

Unlimited payload:
Pause game play and press Down, X, Left, Square, Up(2), Triangle(2), Right(2),
Circle(2), Triangle, Up, X, Down.

Bonus FMV sequence:
Complete all levels and collect all tablet pieces to access the bonus Atlantis
level. Complete the bonus level to view an FMV sequence featuring the
development team.

ALL EQUIPMENT (Added 12-Dec-97)
Pause game and press: D,X,L,S,U(2),T(2),R(2),C(2),L1(4),R1(4),L2(4),R2(4).

LEVEL SELECT (Added 12-Dec-97)
Pause game and press: D,X,L,S,U(2),T(2),R(2),C(2),D,R,U,L,T,X.

ALL WEAPONS (Added 12-Dec-97)
Pause game and press: D,X,L,S,U(2),T(2),R(2),C(2),R1(4),L1(4),R2(4),L2(4).

Full map:
Press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), Square, X, Circle, X, Square.

Extended shark attack time:
Press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), L2(3), R1(3), R2, L1.

Disable currents:
Press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), R1, L1, L2, R2, X.

Full screen display:
Press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), Triangle, X, Up, Down.

Overhead view:
Press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), Triangle, Square, X, Square.

Banana harpoons:
Press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), X, Up, Triangle, Down.

Turbo mode:
Press Down, X, Left, Square, Up(2), Triangle(2), Right(2), Circle(2), R1, R2, R1, R2, R1, R2