Sonic XG (often standing for "Sonic X-treme Generations" or "X-tra Good") is a high-quality fangame originally created for Windows by a developer known as XG-Team or MarkTheHedgehog. It is built using the GameMaker Studio engine and is famous for blending the physics of the Sega Genesis classics (Sonic 1, 2, 3 & Knuckles) with the modern boost mechanics of Sonic Unleashed and Sonic Colors.
Unlike many clunky fangames, Sonic XG features: Sonic Xg Android Game Jolt-
For years, PC users enjoyed this gem. However, the real breakthrough came when the developer released an experimental but fully functional Android port. Sonic XG (often standing for "Sonic X-treme Generations"
Game Jolt is the official hub for Sonic XG development. You will not find this game on the Google Play Store (fan games are not allowed there due to copyright). For years, PC users enjoyed this gem
This is the most common question. SEGA has a famously lenient policy toward non-commercial fangames—unlike Nintendo. In their official "Fangame Guidelines," SEGA states that fans may create derivative works as long as they do not:
The Sonic XG Android Game Jolt release adheres to these rules. It is 100% free, contains no ads, and credits SEGA in the splash screen. That said, SEGA could issue a DMCA takedown at any time. If the link goes dead, that’s why.