Mr. Needlemouse is a hack of the original Sonic the Hedgehog game for the Sega Mega Drive / Genesis, by MKAmeX. It replaces Sonic the Hedgehog with one version (arguably the strangest) of his designer Naoto Ohshima's early prototype of the character, Mr. Needlemouse. Planned features include a complete overhaul of the game's graphics to resemble early concept art, and perhaps new music.

Mutant League Hockey is a hockey game that was released in 1994 for the Sega Genesis. This video game is a spin-off of Mutant League Football and features several of the same team names and players as well as new ones.

OMG THE RED RINGS is a hack of Sonic the Hedgehog (16-bit) for the Sega Mega Drive/Genesis by Fiz. In this hack, all the rings and monitors are replaced by bouncing red rings. Touch one of them and you get killed. According to many people who posted in the original release thread, this hack is extremely hard, and it is probably impossible to beat several of its acts. However, it was received very well by the general audience, including several renowned members; this granted Tech Membership to Fiz (she's now an Oldbie).

Pepsi in Sonic 1 is a ROM hack of Sonic the Hedgehog by Unlimited Trees (a.k.a HorriblePerson on Sonic Retro). It is a parody hack of a lot of ROM hacks out there, which is why there are things such as horrible level "designs", generic palettes, and the usual character switch. This ROM hack features 6 full length zones (plus bonus stages), 3 (+1) playable characters, and many art edits and secrets!

Project Shadow 2 is a hack of Sonic the Hedgehog 2 for the Sega Mega Drive/Genesis by JohnnyUK. The "2" in its title does not signify that this is a sequel of another hack, but instead simply signifies that it is a Sonic 2 hack.

Ray the Flying Squirrel in Sonic the Hedgehog is a fan-made ROM of the game Sonic the Hedgehog for the Sega Mega Drive/Genesis, featuring the character Ray the Flying Squirrel in place of Sonic the Hedgehog, the game's usual protagonist. The creator of the hack is Fabricechaotix.Ray the Flying Squirrel has a air glide move similar to Knuckles but the air glide does no damage when touching enemies. The air glide also does not stop when touching walls. Unlike many Sonic 1 hacks there is no spin dash move.