Sonic Mega Collection

Sonic Mega Collection is a compilation of Sonic the Hedgehog games for the Nintendo GameCube with the addition of many extras.

Seven Sonic games: Three lock-on modes from Sonic & Knuckles: Unlockable Sega Genesis games:
 * Sonic the Hedgehog
 * Sonic the Hedgehog 2
 * Sonic the Hedgehog 3
 * Sonic & Knuckles
 * Sonic 3D Blast
 * Sonic the Hedgehog Spinball
 * Dr. Robotnik's Mean Bean Machine
 * Sonic 3 & Knuckles
 * Knuckles the Echidna in Sonic the Hedgehog 2
 * Blue Sphere
 * Flicky
 * Ristar
 * The Ooze - JP only
 * Comix Zone - JP only

Sonic Mega Collection Plus
Sonic Mega Collection Plus is the PlayStation 2, Xbox, and PC version that includes all of the original content plus the Japanese only unlockable games: The Ooze and Comix Zone. The game also has six Sega Game Gear games not found in Sonic Mega Collection. This version also has an in-game saving feature along with new artwork and movies.

Six Sega Game Gear games:
 * Sonic the Hedgehog
 * Sonic Chaos
 * Sonic Drift
 * Sonic Labyrinth
 * Dr. Robotnik's Mean Bean Machine
 * Sonic Blast