Blazefire Productions

Super Mario: Blue Twilight DX is a non-profit unofficial fangame based on the Mario universe. It combines elements from 3D Mario titles with classic, 2D gameplay, set in Halloween-themed levels. 7+ Levels, 4+ bosses, lots of secrets/unlockables.

Team SCU

A Metroid Prime Fangame made to be playable in 2D on PC.

Sonic Epoch features SatAM Sonic in a time travel adventure as he is blasted 10 years into the future; a dark future where Dr. Robotnik has essentially won, and the very few remaining Knothole Freedom Fighters are barely clinging to life. Sonic arrives to reinvigorate the world and perhaps still be able to fight back the evil Doctor and hopefully somehow get back to his own time. The GBA version was a revival of the cancelled PC version. While the GBA version is "finished", it was a rush job, more for the sake of filling the gap of the previous version's incomplete status, and did not completely honor all aspects of the original story.

Magitek Software

ShenSonic is a fan game made by SimSonic, whose real name is Simon Elo, of Magitek Soft which has also created the Sonic in Mobius games. This fan game was previously created using The Games Factory but the final version used Multimedia Fusion Express. ShenSonic is Shenmue but with Sonic characters and makes changes to the plot to fit the Sonic universe. It features 100+ characters, 4 locations, 8 mini-games, day and night cycle, QTE's, inventory system, and much more.

BlueFrenzy

Sonic Frenzy Adventure is a retro-style fangame developed since 2004, featuring 11 zones and 5 playable characters, including two original ones. The game introduces unique mechanics such as a revised ring system with four levels, various shields with passive effects, and special powers exclusive to Sonic. Players explore each zone, ending in a boss fight, with a storyline focused on defeating EggRobo's mechanical empire. Achievements track high scores and hidden collectibles, and the game offers character-specific routes and challenges.

Emerald Team

Emerald Ties is an upcoming Sonic the Hedgehog fan game that features classic gameplay with a modern aesthetic.

BlazeHedgehog

Beaveration, Showoff Team

The BlueFox Team

Bluehog Gaming Studio

Dario Interactive

Anime Rally

Coldflame Productions

Nik Jam

Shadow Team

BlazeHedgehog

SonKnuck

Platinum Team

Blue Lazor Team

Ksoft

Dario Interactive

MaxSonic Productions

Sonic Revitalized 3D

Cinossu, VibrantDarkness

A Sonic game which was being produced by VibrantDarkness and Cinossu, shown as a secret title at SAGE 9. Information about it is scarce, its SAGE booth didn't get properly archived. According to the page, Sonic, Tails and Knuckles would be in the game. No release date was given.

The Chaotic Order

Sonic World Studios, Sonic Elite, Bluehog Gaming Studio