Sonic 3: Angel Island Revisited (Sonic 3 A.I.R.) is an unofficial port of Sonic 3 & Knuckles for Windows PCs. It very closely resembles the original game, but adds features you would only expect from a modern fan game engine - including full support for 16:9 widescreen display, alpha transparency effects, and smooth 360° rotation.
Sonic 2 XL is a hack of Sonic the Hedgehog 2 for the Sega Mega Drive by Captain Bozo and Ranger. Rings are replaced with onion rings, and Sonic becomes fatter after eating them.
Sonic the Hedgehog: The Next Level is a overhaul modification of Sonic the Hedgehog developed by MarkeyJester. This time around Sonic explores a new otherworldly zone- for that's exactly what it is! It seems Dr.Robotnik has grown tired of the same shtick and is now trying to conquer the Gust Planet! He has trapped the Animals of the planet in his new models of badnik and has managed to collect a Chaos Emerald! He's used this emerald to power his new machine the Reality Bender! Sonic soon catches on to Dr. Robotnik's scheme and makes his way over to the Gust Planet Zone himself to put a stop to his evil scheme!
Robotnik's Revenge is a hack of Sonic the Hedgehog 2 by ColinC10. It is a "boss rush" hack, in which all seventeen bosses from Sonic the Hedgehog and Sonic the Hedgehog 2 are fought in a somewhat arbitrary order over the course of a single level. The game takes place in Death Egg Zone from Sonic 2, and is meant to imply that there is more to the ship than there is in the original game. Time spent completing the boss run is kept and the total time is given at the end of the course, along with a ranking. In Time Attack mode there are infinite lives and rings that can be found in-between battles. In survival mode, there are only 3 lives and no rings.
Platform / Adventure / Action / Fantasy
Sonic 3 Complete is a hack of Sonic 3 & Knuckles which aims to provide a much improved variant of the original game, with many new options and features, without straying from the original levels or gameplay. The inclusion of separate modes for Sonic 3, Sonic & Knuckles and Blue Sphere also make this a close cousin of the PC compilation Sonic & Knuckles Collection, albeit designed for the original 16-bit hardware.
BakaSonic is a hack of Sonic the Hedgehog for the Sega Mega Drive by Bakayote. A demo of it was submitted for the 2014 Sonic Hacking Contest. Started by Bakayote as practice for hacking, BakaSonic has been evolving since its creation, even being a prank at one point early in its development. This hack contains level art, object art, code and music modifications.
Released in 2016 on Super Nintendo Entertainment System, by authorblues.
Platform / Adventure / Action / Fantasy
Circle of the Moon was a great Castlevania game, but the card system left something to be desired. Cards being dropped solely from enemies was less than desirable, since it meant that the main gimmick of the game was locked behind a game of dice. This mod makes the cards more accessible by placing them in specific locations around the world. Enemies who did drop cards now instead drop meat, as a nod to the classic style Castlevanias. Cards are generally placed in an ascending order of power; you won’t get big bone powers by searching the early areas.
Shooter / Platform / Adventure / Action / Science fiction
Metroid II DX is a mod that converts Metroid II to the Game Boy Color, now colorized. Not to be confused to the official Metroid II: Return of Samus DX, which was never released.