jelos.org/docs/systems/3do.md

Panasonic 3DO

Overview

Game Path	Supported Extensions
roms/3do	++".iso"++ ++".bin"++ ++".chd"++ ++".cue"++

Emulator/Core

Name	Documentation
Opera   default	docs.libretro.com/library/opera

Bios

Path: roms/bios

Emulator	Required Files
Opera	https://docs.libretro.com/library/opera/#bios