This page contains Cheats for Cosmo Tank organized by sections for GameBoy. Cosmo Tank is a Action Shooter Scrolling game, made by Asuka Technologies and published by ATLUS. If you can't find a hint or secret in our list, then please check this page periodically for the latest updates.
On the subscreen at the beginning of the Quest Mode, simultaneously press and hold Down, A and B. While holding these, press Start. If this is done correctly, the message "Sound Test 01" will appear....From: Monique
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