Gremlin 11 team: Press Left, Right, Square, Circle, Up, Down, Square, Circle at the title screen. A message will appear to confirm correct code entry.

Invisible players:
Press Square, Circle, Down, Circle, Up, Right, Square, Left at the title screen. A message will appear to confirm correct code entry.

Large players:
Press Up, Down(2), Right, Square, Square, Circle(2) at the title screen. A message will appear to confirm correct code entry.

Small players:
Press Circle, Down(2), Square, Up(2), Left, Right at the title screen. A message will appear to confirm correct code entry.

Play with beach ball:
Press Left, Right, Left, Up, Left, Right, Square(2)at the title screen. A message will appear to confirm correct code entry.

Super furry animal mode:
Press Left(2), Square, Right(2), Circle, Up, Down at the title screen. A message will appear to confirm correct code entry.

Ghostball mode:
Press Square(2), Left(2), Right(2), Circle(2) at the title screen. A message will appear to confirm correct code entry.

No floodlights:
Press Left(3), Circle, Right(3), Square at the title screen. A message will appear to confirm correct code entry.

Monochrome mode:
Press Up, Down, Up, Square, Circle, Up, Down, Up at the title screen. A message will appear to confirm correct code entry.