Sonic 2 Hybridization Project Game

This hack combines Sonic 2 (16 bit) and Sonic 2 (8 bit), and it has updated graphics and emulates the 8 bit levels.

Sonic Sunventure

Sonic Sunventure

Five original levels and new music are featured in this succinct yet delightful Sonic 1 hack. Contains a few surprises as well as some new monitors.
Knuckles In Sonic 1

Knuckles In Sonic 1

In this Sonic the Hedgehog 1 hack, Knuckles takes the place of Sonic. Knuckles can climb walls and glide through the air but is less adept at jumping. Some bosses and stages will be made easier by Knuckles' special skills, while others will be far more challenging.
Sonic Jam 6

Sonic Jam 6

Sonic has arrived in the Mario universe! Spin and hop as usual, but after you get your hands on the great fireflower, you can also throw fireballs!
Metal Sonic 2

Metal Sonic 2

There are three alternative play styles available for Metal Sonic, who takes the place of Sonic as a playable character.
Sonic RPG Eps 1 part 2

Sonic RPG Eps 1 part 2

In the second part of the very first Sonic RPG episode, our hero Sonic does battle with Eggman's Robot.
Sonic Winter Adventures

Sonic Winter Adventures

A rom hack called Sonic Winter Adventures features a lot of new Sonic moves and a snowy setting for the game. At the end of each level, there are brand-new boss battles to engage in, and Sonic can now super dash while running. This game is good overall.