Sonic ERaZor is a hack of Sonic the Hedgehog (16-bit) created by Selbi. This hack is unlike many other hacks, featuring a heavy in-game story line, unique challenges, and never seen before gameplay mechanics. These elements are often somehow related to explosions, which is why this hack is sometimes called "What if Michael Bay directed Sonic 1".

When first released back in early 2010, Selbi stated that this hack has no goal whatsoever and any ideas he came up with just went in. Today's releases have a lot more structure and thought out gameplay elements. The difficulty has been steadily decreased between the different versions, mostly due to some negative feedback regarding the first releases, although they all have an above average difficulty, and is therefore regarded by many as quite interesting and challenging, if not frustrating.

A notable aspect about this hack is that it contains many cutscenes, chapter screens and story screens. The game's first scene after the title screen is entirely a cutscene.