From IGN, the Sonic Mega Collection Plus is coming to Xbox Nov. 2 for $20.
Games are:
Sonic The Hedgehog (Sega Genesis)
Sonic The Hedgehog 2 (Sega Genesis)
Sonic The Hedgehog 3 (Sega Genesis)
Sonic & Knuckles (Sega Genesis)
Sonic 3D Blast (Sega Genesis, Saturn)
Sonic The Hedgehog Spinball (Sega Genesis)
Dr. Robotnik's Mean Bean Machine (Sega Genesis)
Sonic & Knuckles lock-on: Sonic The Hedgehog 2
Sonic & Knuckles lock-on: Sonic The Hedgehog 3
Sonic & Knuckles lock-on: Blue Spheres
The Ooze
Comix Zone
Flicky
Ristar
Sonic the Hedgehog (Game Gear)
Sonic Chaos (Game Gear)
Sonic Drift (Game Gear)
Sonic Labyrinth (Game Gear)
Dr. Robotnik's Mean Bean Machine (Game Gear)
Sonic Blast (Game Gear)
No Sonic CD listed, they said it must be harder to emulate.
Nice set though, even better than the GC.