Well, Sonic Generations took my personal spotlight for the Best Sonic Game Ever, but Sonic CD is still one of my top favorite Sonic games, and now that there's this remake, everyone will get to see why I love it so much (To come to think of it.....Maybe this remake and Generations get my top spot...).
Sonic CD was released for the notorious Sega CD, an add-on for the Sega Genesis. It was the only game on the add-on to sell around a million copies. But even then, many fans haven't heard of this game. At least it was re-released in Sonic Gems Collection. And now, it's gotten full-time respect with a remake of the game that now includes the Japanese soundtrack AND US soundtrack, Tails, and a whole bunch of achievements!
As for the main game itself, Sonic CD took what made Sonics 1 & 2 so awesome, and multiplied them 10 times over! This game has all the high-speed Sonic action you could ever want. Not only is the platforming action top-notch, but the new levels are better than ever! And they are full of extremely colorful detail. Plus, in the Special Stages, you can navigate Sonic around roads to destroy UFOs to gather Time Stones (Alternate version of Chaos Emeralds basically) in a Mode-7-like view; a unique goal for a Special Stage.
Besides the achievements and the 2 soundtracks, Tails was another reason why to get this new version of the game. You see, Tails looks like as if he was ripped right out of Sonic 3, complete with the ability to fly.
Overall, this is one Sonic game you have gotta try! If you like the Genesis Sonics, you will LOVE Sonic CD. It's better than every Sonic game there is, with the exception of Generations. Plus, you can buy this for just a measly $5 bucks. It's a steal! Just be sure to have Steam installed.