Successfully complete the game under a difficulty setting of "8" in quest mode.
Expert mode
Successfully complete the game under a difficulty setting of "7". Difficulty setting "8" will now be unlocked.
Level select
Successfully complete the game with all 70 fairies collected.
Nine continues
Note: This game is also titled Jikkyou Osahberi Parodius: Forever With Me and Chatting Parodius. Pause the game and press Down(3), X, Circle, X, Circle, Triangle, Square, Triangle, Square, Up(3), Left, Right, Left, Right, Left, Right.
Nine planes
Pause the game and press Up, Down, Left, Right, Square(2), Left, Right, Square, Circle, Up, Down.
Restart with items
Save the game after collecting items and weapons. When the game is reloaded, you will still have the objects, but the score will be reset.
Self-destruct
Pause the game and press Up(2), Down(2), Left, Right, Left, Right, X, Circle.