The S Factor: Sonia and Silver, another obscure Sega Genesis title, likely involves a game centered around characters Sonia and Silver. Without official documentation or widely available information, the details of its genre, gameplay, and plot remain unknown. The game may have been either a commercial release, or an unreleased prototype. The developer and publisher are unknown.

The S Factor: Sonia and Silver

Test Drive II - The Duel (USA, Europe)