@windg said in Extract region of games via command line:

You can take the hash of the rom and compare it with a database. For example this site : http://redump.org/ have the hashes of the games of a lot disk systems.

Unfortunately that site does not have retro games listed. Only PSX, Dreamcast and up. However the m5 hash approach gave me an idea: I can download a rom pack and compare my roms to the ones from the pack. Thanks for your helpful answer! :-)