Sonic 1 Sage 2010 Game
Playing a time-attack game where you can select any act and level (including enemies) in an effort to beat the clock
Sonic Mania Edition
Sonic Mania Edition is a rom hack that draws inspiration from the Sega Genesis version of the first Sonic the Hedgehog game and also incorporates certain features from the future Sonic Mania game. It is a timeless platform game that gives the Sonic Franchise a fresh look. It came out in 2016.
Sonic the Perfect Existence
This rom was one of the first Sonic 2 hacks to substitute Shadow the Hedgehog for Sonic and to add Mizu as Shadow's companion. Even if the Shadows sprite set was not all finished, the new levels and music are excellent.
Sonic 1 Flash Flood
Includes rain and intermittent flooding, weather mechanics, new levels, and auto level choose!
Sonic Chaos GG
The Chaos Emeralds must be retrieved from that evil guy by Sonic and Tails. Robotnik Dr.
Sonic Burned Edition
Sonic Burned Edition is a well-executed rom hack of the original Sonic the Hedgehog for the Sega Genesis, with entirely new levels and a fire theme.
Mega Sonic Scene Maker
Choose from multiple backgrounds and tons of doodads including oversized Sonic, Tails, Knuckles, and Robots.