ISG Productions
About
ISG Productions (short for Interactive Support Group) originally made CD-I emulators. According to David Mullich, Lee Chidgey, one of ISG's programmers, was very interested in making games, and played a large role in convincing ISG's owners to head in that direction.
The studio debuted with Video Speedway in 1992. Two other games, Tox Runner and Plunderball, were eventually never released.