This short article is in need of work. You can help Sega Retro by adding to it.
GEMS is a sound driver used in 186 documented games for the Sega Genesis, including Sonic Spinball. It was developed by Technopop by Sega's request.
On September 24, 2007, drx released the official GEMS development kit.
List of Sega Mega Drive games that use GEMS
List of Sega 32X games that use GEMS