The Hacker2002

Somari is a side-scrolling platform video game, originally released in 1994 for the Famicom. An unlicensed port of Sega's 1991 Sega Genesis game Sonic the Hedgehog, the game was sold primarily around Asia, Russia, and other regions where pirate NES cartridges were distributed. Like the original, players venture to defeat the mad scientist Doctor Robotnik, who plots to turn the animal population of the fictional South Island into evil robots. Unlike the original, the game features Nintendo's mascot Mario as the main character rather than Sonic. The title is a portmanteau of "Sonic" and "Mario".

Mario 4: A Space Odyssey is a bootleg game based on the Mario series made for the Sega Genesis.

An unlicensed NES game based on The Jungle Book.

Felix the Cat is an unlicensed platform game developed and published by Dragon Co. in 1998. It is unrelated to Hudson Soft's official Felix the Cat title, released in 1992, but the gameplay of the two games is very similar.

Donkey Kong Country 4 is a pirated port of Donkey Kong Country from 1994 for the SNES, made by Hummer Team in 1997. The gameplay, graphics, and sound are similar to the official Game Boy Color port of Donkey Kong Country, albeit downgraded to work on the Famicom. It's often considered to be significantly superior to other pirates based on the Donkey Kong Country series.

Mario 3: Around the World is a unlicensed Mario game developed by BMB for the Sega Genesis.

Titanic (also known as Titanic 2005) is an unlicensed NES/Famicom game made by Nice Code/Dragon Co. and published by Shenzhen Nanjing Technology in 2005. It can also be found on certain plug & play systems, under a different name. You can choose to play as Jack or Rose, and your objective is to escape the ship.

A rom hack with just 1 level made for SMW Central's Chocolate Level Design 2010 contest.