Cosmo Tank (US Prototype)

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Title Screen
Cosmo Tank (US Prototype)
Build name N/A
Dump status Released, redump needed
Dumped by Video Game History Foundation
Released by Hidden Palace
File release date January 1, 2022
Origin EPROM cartridge
Labels N/A
Game Cosmo Tank
System Game Boy
Genre Action
Final build JP Mar 9, 1990
EU Unreleased
US Jun 25, 1990
Release date JP Sep 8, 1990
EU Unreleased
US Sep 1990
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A prototype of Cosmo Tank for the Game Boy.


  • Late prototype.
  • Prototype says "Licensed by Nintendo of America" while the final says "Licensed by Nintendo" on the title screen.
  • Spelling and grammar changes.



File Type Date Size Comment SHA-1
Cosmo Tank (US Prototype).gb ROM file 2002-08-24 17:22:30 128 KB ROM file. 863bf21877b5f5993b9e64710f304b8db194d2e7


Special thanks to Frank Cifaldi at the Video Game History Foundation and the anonymous donor for this part of the lot! A huge thanks to ehw for researching this prototype!

See also