DJ GEMS Demo (prototype)

DJ GEMS Demo (prototype)
Dump status Released Dumped by CartridgeCulture Released by CartridgeCulture File dump date May 31, 2026 File release date September 17, 2026 Origin Cartridge Labels D.J. GEMS DEMO Game DJ GEMS Demo System Sega Mega Drive Release date Unreleased

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D.J. GEMS Demo is a Genesis cartridge created in 1994 by Developer Technical Support's Ken Chao for departing Sega of America composer David Javelosa. Chao loaded Sega's existing GEMS Module Test Program with a collection of Javelosa's original GEMS tracks, producing what amounts to a demo tape in cartridge form for the artist.

The demo surfaced publicly in May 2019 when one of Javelosa's game design students recognized the Sonic 2 material during a class demonstration and shared it online, with a recording soon appearing on the artist's YouTube channel. It was later dumped by Ashley Rojas in May 2026 and released the following September.

Notes

The Cutting Room Floor research

This prototype has a research article on TCRF.

Origin

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See also

• Release thread