Ripping Games
Contents
From Disc
From Cartridge
From Console
NES Classic
SNES Classic
PlayStation Classic
From Digital Distribution
Some digital distributors sells games in an emulator + ROM/BIOS form. The ROM can easily be extracted from game installation.
Neo Geo Games
GOG
MAME / FBA compatible games:
Tutorial:
Sega Genesis / Sega Megadrive Games
Steam
SEGA Mega Drive and Genesis Classics on Steam installs a folder called "Uncompressed ROMs".
On Windows, the ROMs can be found in:
C:\Program Files (x86)\Steam\steamapps\common\Sega Classics\uncompressed ROMs\