Within communities like r/DataHoarder, such files are sometimes shared as "mystery packs."
If you are looking at this file on your hard drive, here is what the extension tells you:
LZMA/LZMA2 compression , which offers a much higher compression ratio than standard ZIP. various2.7z
It’s a form of digital archeology. Opening the file is a gamble; you might find a rare collection of 2000s-era web icons, a defunct forum’s SQL database, or just a thousand copies of the "All Your Base Are Belong To Us" GIF.
These often house "non-good" sets—files that didn't fit into a standard regional release (US/EU/JP), such as fan translations, hacked versions, or prototype ROMs for systems like the NES, SNES, or MAME. These often house "non-good" sets—files that didn't fit
In the world of retro gaming and emulation, "various" archives are frequently found on sites like the Internet Archive or old FTP mirrors.
Because the name is so non-descript, it is occasionally used by bad actors to disguise malware. If you found this on a random drive or a shady forum, it’s the ultimate "proceed with caution" file. Technical Summary If you found this on a random drive
from games that require an emulator to run today. 2. The ROM Set & Emulation Scene