The released a definitive 3DO ISO archive around 2018-2020. This torrent is still widely seeded. Search for "TOSEC - Panasonic 3DO (2020-04-01)".
This franchise started here. The 3DO version was praised for its realism and cockpit views long before it became a global juggernaut. Star Control II
Unlike its contemporaries, the 3DO was not a console manufactured by a single company, but a technical specification 3do iso archive
That said, preservationists argue that for a console that sold only 2 million units worldwide, archiving is the only reason these games still exist at all.
The 3DO library is relatively small (around 300 titles worldwide), making it a "completable" goal for digital archivists. Organizations like The Internet Archive The released a definitive 3DO ISO archive around 2018-2020
Original 3DO discs are deteriorating. CD rot, scratched surfaces, and failing lasers in original hardware mean that without digital preservation, dozens of games—especially niche Japanese titles—would vanish forever.
Once ripped, verify it against the Redump database. This franchise started here
It looks like you're looking for —likely ROMs or disc images of games for the Panasonic 3DO, GoldStar, or Sanyo 3DO consoles.