Cheat Mode Enter "CHEATONX" as a password. Then while playing a game, press Select to display a cheat menu. Press Up or Down to select a level or Left or Right to select a zone. Press A for invincibility (001 will appear if done correctly).
Classic Asteroids Mini-game Enter "QRTREATR" as a password.
Excalibur Ship Enter "PROJECTX" as a password.
No Gameshark Asteroids Hacks found.
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Asteroids Strategy Guide
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