When "Press Start" appears at the title screen, hold Select and press Square, Triangle, Circle, Triangle(2), Square, Circle. If you entered the code correctly, you will hear the sound of an exploding asteroid. Then while playing a game, press Start + Select to display a cheat menu. Use the D-pad to select a new level and zone, as well as toggle collision detection. Press L1 to resume the game.

When "Press Start" appears at the title screen, hold Select and press Triangle, Circle(2), Triangle, Square, Circle, Square. If you entered the code correctly, you will hear the sound of an exploding asteroid.

When "Press Start" appears at the title screen, hold Select and press Circle(3), Triangle, Square(2), Circle. If you entered the code correctly, you will hear the sound of an exploding asteroid. Then, press Start and select the "Classic Asteroids" option on the main menu. Alternatively, reach Zone 1, Level 15, then locate and shoot the green vector graphics asteroid that appears. If done correctly, big words in green will appear on the screen. Complete the level and save the game to keep the original version of the game unlocked.

Pause the game and press Down(2), Up(2), Circle, Square, Triangle(2).

Pause the game and press Up, Down, Left, Right, Circle, Square, X, Triangle.

Pause the game and press Up, X, Down, Triangle, Left, Square, Right, Circle.