checked-no =>Extra Modes: On the main menu, hold [L] and then press cL cR cU cD A cU cD cL cR [START]. Classic and Credits will appear on the main menu. When you begin a normal game, you will have the option of enabling Relentless mode. =>Cheat Menu: Pause the game, hold [L] and press cLx2 cRx2 B A cUx2 cDx2 [START]. =>Classic Asteroids: To unlock the classic Asteroids game without using the cheat code, play until you reach stage 1-15. Shoot the strange green thing. =>All Ships: On the main menu, hold [R] and press cL cU cR cD B cL cD cR cU [START].