One way or another, Sonic Team has ALWAYS managed to disappoint their fans with all these Sonic collection games after Sonic Jam for the Saturn. There was Sonic Mega Collection for the Gamecube, in which they promised that Sonic CD would be part of the collection, along with Sonic R, and a few other games. And then in the end, they scrap it, and come up with some BS excuse like "It was removed, due to lack of space", or "We couldn't properly emulate the Sega CD", and other crap like that, when I know for a FACT that they could've done it, they just didn't WANT to. Then, there was Sonic Mega Collection Plus, which they added some stuff that the other one didn't have, but they STILL don't give people what they really want, such as Sonic CD or Knuckles' Chaotix.
And now, there's Gems Collection, where they finally DID put Sonic CD on it, along with Sonic the Fighters and some others. Personally, this game was more of a disappointment than the others for a number of reasons. Number one, they only decided to release this game for the Gamecube in the U.S., and it was a watered down version of the Japanese version. I'm talking about the fact that they cut Streets of Rage 1-3 from the U.S. version, and kept it in the Japanese version for the Playstation 2. They made up ANOTHER BS excuse, and this time having to do with game ratings. They talk about how Streets of Rage is a "mature" game, when it was just your average fighting/beat 'em-up game with absolutely NO blood, or ANY mature content whatsoever. Then, they decided to "replace" it with Vectorman 1 and 2 (which are good games, by the way). And then, I find out that Japan gets both Steets of Rage AND Vectorman, which leaves the U.S. with less games.
Another thing I hate about it is how games like Knuckles' Chaotix and SegaSonic Arcade were promised to be in this collection, and then they cut them. And even when the game was cut, they decided to have a bunch of Chaotix artwork in there, despite it not actually being INCLUDED in the game. Things like that are nothing but a slap in the face to Chaotix fans, and just people in the U.S., period.