Sonic XG

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Fast Facts on Sonic XG

Latest Version: SAGE Demo 2007 (Demo 1)
Engine: Custom
Credits: Sir Euan, Nitemare

Sonic eXtended Genesis, aka Sonic XG, is a game being created by Sir Euan and Nitemare, and has gone through many different variations in the past.

At one point in time, the fangame was going to be merged with Retro Sonic and Sonic Nexus in order to create Retro Sonic Nexus, a decision made in 2007, but is again being developed as a separate title.


Happening after the events of Sonic & Knuckles, Sonic falls from the atmosphere and lands on the tornado, carrying the Master Emerald. Suddenly, an object flies by striking the tornado with laser beams twice, plummeting Sonic to the Floating Island. It is revealed seconds later to be none other than Metal Sonic, who seen holding the Master Emerald, then flying off. In the background, a burning Death Egg is seen tumbling downwards, closer and closer, to the Floating Island....


Sonic XG started out as a fan game known as Sonic Forever. A website was available in 2005. In early 2005, the public engine test build for Sonic Forever was available for testing purposes. The engine was lost on the internet but was later found again in 2013. The project failed because of the two-man partnership not working out. The one team member, Sir Euan, took what he had from the previous project and transferred it into what was then called Sonic XG, short for Sonic eXtended Genesis. This was worked on with the efforts of Sir Euan and Nitemare who intended on making the game continue immediately after the events of Sonic & Knuckles. Back in around 2007, ten zones were planned as shown on the website, and two of the Zones were not revealed. In 2007, a new fan game was in the works combining two other Sonic fan games (Retro Sonic and Sonic Nexus) with Sonic XG becoming Retro Sonic Nexus. The game was worked on by Slingerman, Taxman, and other teammates involved with the other fan games. Retro Sonic Nexus was then shelved when Taxman announced the discontinuation of the fan game in 2011. However, in 2012, Nitemare (aka Joe Waters), a member of Sonic XG, has taken what was left over of the game and decided to make Sonic XG again as a standalone title. On his youtube page, he has four previews of the game, showing the progress of the game. The release date is currently unknown.

Download.svg Download Sonic XG
File: Sonic XG Demo 1.rar (13.82 MB) (info)
Current version: Latest Public Demo (2007)

Old Versions

External Links