A special extended version of the Sonic Mega Collection Plus contains 20 of the most popular Sonic the Hedgehog and SEGA Genesis titles in one convenient set. It carries over all the content of the previous version, including the following emulated Genesis games:
Sonic the Hedgehog: Spinball
Dr. Robotnik's Mean Bean Machine
The new collection includes the special games created by locking Sonic & Knuckles onto earlier Sonic games: Blue Sphere , Knuckles the Echidna in Sonic the Hedgehog 2 and Sonic 3 & Knuckles .
New to the Plus version is a save-state function, lots of new artwork, movies and comics. The Genesis games The Ooze and Comix Zone were now available in all regions. A Game Gear emulator was also added along with six Game Gear games:
Dr. Robotnik's Mean Bean Machine
The Sonic Mega Collection Plus was released on November 2, 2004 for the Xbox.