Among the Others

Mega Man X in Sonic The Hedgehog 2 is a ROMhack/mod of Sonic The Hedgehog 2 which lets the player control Mega Man X instead of Sonic, with all of his signature attacks, like the charge beam, the wall jump and the dash, and X can also get the weapons from his enemies, like in his own games.

Sonic the Hackable is a ROM hack of the original Sonic the Hedgehog for the Sega Genesis. Originally started as a practice project focused on level design, it has since evolved into a comprehensive "demake" of Sonic the Hedgehog 4: Episode I. The hack reimagines the modern Sonic 4 aesthetics and level concepts within the technical limitations of the 16-bit engine, featuring signature moves like the Spin Dash and Air Dash alongside entirely new level layouts and remixed soundtracks.

Sonic the Hedgehog OmoChao Edition is a ROM hack of Sonic the Hedgehog (16-bit) by Cinossu. Originally starting as a joke between himself and Qjimbo, later on becoming a joke hack as an idea for April Fools, with the addition of OmoChao it became a challenge-based (and playable) hack, where the objective is to collect, destroy or even touch as little as possible.

Hellfire Saga is a full-fledged Sonic the Hedgehog 3 & Knuckles ROM Hack developed by Red Miso Studios, where Sonic goes through levels that are heavily based on classic 80/90s games and with a dark/spooky theme (Castlevania, Ghouls n' Goblins, etc).

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.

Super Mario World (超級馬里奧世界) is a bootleg port of the SNES launch title of the same name (Super Mario World) developed by Hummer Team and released in 1995. This is one of the more well-known examples of bootleg ports to the Famicom, as it comparatively manages to retain most of the original SNES game's elements.

New Super Mario Land is a recreation of Super Mario Land (Game Boy) using New Super Mario Bros. (Nintendo DS) assets and released for the SNES, with pseudo-3D graphics and a new co-op multiplayer mode.

Aladdin is a port of the SNES version of the game of the same name, made by Hummer Team in 1995. The game is one of the more well known pirate ports and is commonly found on multicarts (in its MMC3 hacked form).