Clockwork Knight Pengo War was an early Saturn prototype which was never announced and just as quietly canceled. It often referred to as "Penguin War" though this is likely a misunderstanding of a mistranslation on the label, instead probably intending to be titled "Pengo War".

The release of the alpha build came as a surprise with the title being unknown to the community at large. The version is listed as 0.1 thought it is playable, just not completable.