Game.Com
Tiger's Game.Com was designed to compete with Nintendo's juggernaut, the Game Boy. It sported some original features, like a touch screen, a screen pen for input, and a simple text-based Internet service, but it didn't really stack up in the games department. Its library included the first official appearance by Sonic on a non-Sega console (unless you count the PC). These 2 titles are arguably the most obscure Sonic games ever produced.
Sonic Jam
This game included several stages from Sonic 2 and Sonic 3 & Knuckles. We don't really know much more about it than that.
Sonic R
We know even less about this one. It was probably at least somewhat related to the racing title on Saturn.
General Info