Enter the following codes at the title screen when the words "Press Start" are flashing. A sound will confirm if you entered each cheat correctly.
Invincibility: Press Down, Down, Up, Up, Circle, Square, Triangle, Triangle.
Unlock Fourth Ship: Press and hold Select, and press Triangle, Circle, Circle, Triangle, Square, Circle, Square.
Level Select: Press and hold Select and press square, Triangle, Circle, Triangle, Triangle, Square, Circle. Start the game and simultaneously press
Start and Select to bring up a level-select and invincibility cheat.
Unlock Classic Asteroids Game: Press and hold Select and press Circle, Circle, Circle, Triangle, Square, Square, Circle.
Note: The following codes work only with the Classic Asteroids game:
Pause the game and enter any of the following cheats:
Extra Life: Press Up, Down, Left, Right, Circle, Square, x, Triangle.
99 Ships: Press Up, x, Down, Triangle, Left, Square, Right, Circle
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