Sonic the Hedgehog 2 HD is an unofficial fan remake of the 1992 SEGA Genesis/Mega Drive classic Sonic the Hedgehog 2 using up to date graphics with a few new novelty features here and there.
The graphics have been completely remastered in pure HD. Also new features planned were online multiplayer, playable Knuckles, and a few extra levels.
It looks fantastic and it plays fantastic. It's one of the best fan games I have played. It's really a shame that it was cancelled. It had a lot of potential.
If you wish to try out the demo yourself, click here.