Sonic Mega Collection review:5 stars (z) - Simple as this: Everything a fan could ask for, and it's all of the games plus more in one package.5 stars (GREAT!) - This A Pretty Good Game, With most of the the sonic classics. I haven't had this game very long yet,so I haven't got a chance to unlock bonus games, but another person who reviewed this game has.
I am posting the games, posting my top 3 favorite games.

1.Sonic The Hedgehog
May not have tails yet,and no Spin Dash,but I really enjoy the zones. (Marble Zone,the 2nd zone, is really fun!)

2.Sonic The Hedgehog 3
Cool zones, and the only game you can play where you can make tails fly and swim.

3.Sonic 3D Blast
Really fun. I love how you only have to press A to spin dash. It's also fun to rescue the flickies (a fake kind of bird)

I wish they'd put in a dfferent game instead of sonic spinball though. Otherwise this is a fun game!4 stars (Play the original need for speed) - This is a very fun compilation disc. As an SNES owner, I never had a copy of the Sonic games, so this was a great addition to my library. It includes 7 main games, unlockable games, and lots of bonus material.

Of the 7 games, Mean Bean Machine and Sonic 3D Blast are the duds. One is a tetris/puzzle bobble/tetris attack variation while the other is a pseudo-3D game from an isometric perspective. Its nice to have them for completion purposes, but thats about it. Sonic Spinball is a cool (if hard) pinball variation.

The real fun is in the 4 traditional platformers, ranging from Sonic 1 to Sonic and Knuckles. All four stand the test of time very well, with catchy music, tight controls, and colorful graphics. Sonic 3 is probably the weakest, as it's rather short and seems more mean-spirited about where hazards are placed, but its still a fun time. As a side note, the variations of the "Sonic and Knuckles" lock-on cart are also included as bonuses.

So what's missing? Sonic CD, which is rumoured to be on the next mega collection (the videos are here though). A save function (apart from Sonic 3) would also have been nice. Finally, the PS2 and X-Box editions have the Game Gear Sonic games as bonuses, but these can be found on the Sonic Adventure Director's Cut disc for those interested. Sonic Mega Collection is a worthwhile old school gaming experience.
Sonic Mega Collection Features:
Video Games
Gamecube (Game Cube, Game-cube)
Action
Adventure
Platform: Nintendo GameCube
ESRB Rating: Everyone
Genre: Action/Adventure

Sonic Mega Collection is the Video Game version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around 19.99USD.