I played Sonic CD in its day, and it's still probably my third favorite game after StH3&K and StH2. I loved the cutscenes, the time-travel element, and all the hidden scenes and features that could be unlocked. Really wish they'd rerelease it, especially now that I've lost track of my Sega CD.

There were three Sonic games for the Master System: Sonic the Hedgehog, StH2, and Sonic & Tails (a.k.a. Sonic Chaos). They were all eventually ported to the Game Gear; Sonic & Tails 2 (a.k.a. Sonic Triple Trouble) was the only game specifically made for the Game Gear.