Original Asteroids Mini-Game:
When "Press Start" appears at the title screen hold Select and press Circle, Circle, Circle, Triangle, Square, Square, Circle. If
the code has been entered correctly you should hear the sound of an exploding asteroid. Press Start and go to the main menu
and you should see the option "Classic Asteroids". 
Excalibur Ship:
When the words "Press Start" flash at the title screen hold Select and press Triangle, Circle, Circle, Triangle, Square, Circle,
Square. The sound of an exploding asteroid will confirm your entry.

Level Select:
When the words "Press Start" flash at the title screen hold Select and press Square, Triangle, Circle, Triangle, Triangle, Square,
Circle. The sound of an exploding asteroid will confirm the entry. Next, you must press Select + Start while in game play. Use
the D-pad to select a new level and zone, as well as toggle collision detection. Press L1 to resume game play. 

Extra Life (Mini-Game):
Pause your game during play, then press Up, Down, Left, Right, Circle, Square, X, Triangle. 

99 Lives (Mini-Game):
Pause your game during play, then press Up, X, Down, Triangle, Left, Square, Right, Circle. 

Invincibility (Mini-Game):
Pause your game during play, then press Down, Down, Up, Up, Circle, Square, Triangle, Triangle.

                                        Game Shark Codes

     Infinite Lives - 8011013C 0009