The ZZZ-UNK prefix heading this entry and several of those that follow is a common cataloguing convention in software preservation archives: it alphabetically groups, at the end of the listing, pieces of not fully verified origin, authorship, or development state, to tell them apart from confirmed commercial releases. 2001_V2 fits that profile: a compilation or work-in-progress version with no solid authorship data or exact date beyond what its own file name suggests. Rather than inventing context that can't be confirmed, it's worth documenting it for what it is: one fragment of the enormous amount of experimental material circulating in Atari scene preservation circles.
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