Sonic XG has been in the works for many years. It was originally a standalone game, then merged with Sonic Nexus and Retro Sonic, and now back to a standalone game.
Sonic XG stands for Sonic Extended Genesis. It's a fan sequel to Sonic 3 & Knuckles. The gameplay is similar to that of the classics, but adds a few new gimmicks here and there. It's one of my favourite fan games, and I look forward to the upcoming new version of the game.
You can download the demo by clicking here, or try out an earlier test build of the game by clicking here.
What's your thoughts on Sonic XG?