* RetroArch is licensed under the GPL and we maintain good relations with the actual emulator authors. Any emulator you see in this 'pack' is compliant with the original license of the emulators, and in most cases also endorsed by the official authors and/or the current maintainers,
While RetroArch might be licensed under the GPL, the emulators themselves might have a 'non-commercial' license or any other proprietary license that forbids selling (such as FBA and Genesis Plus GX). YOU ARE THEREFORE COMPELLED TO OBEY BY THE SPECIFIC LICENSE DEMANDS IMPOSED BY THE EMULATOR CONTAINED IN THIS PACK IF YOU HAVE ANY INTENTION OF 'REUSING' ANY OF THE SPECIFIC CORES CONTAINED IN THIS PACKAGE. YOU COMPLY WITH EACH LICENSE ON A PER-CORE BASIS.
FOR USERS - PLEASE READ -
* Read the manual here - I've seen people say it doesn't have features which it does - like save states and such.