Free Comic Specials are single issue comic books published by Archie Comics, containing Sonic the Hedgehog related material, such as reprints, data files, and original stories, distributed for free for promotional purposes. The most common specials are distributed on Free Comic Book Day in May and the Halloween Comic Fest in October. Material printed in these issues is considered canon unless stated otherwise.
- Sonic the Hedgehog #1/4
- Archie & Friends: A Halloween Tale
- Archie's Weird Mysteries
- Sonic and the Secret Rings
- Sonic Free Comic Book Day 2007
- Sonic Free Comic Book Day 2008
- Sonic Free Comic Book Day 2009
- Sonic Free Comic Book Day 2010
- Sonic Free Comic Book Day 2011
- Sonic Free Comic Book Day 2012
- Sonic/Mega Man Free Comic Book Day 2013
- Sonic Halloween Comic Fest 2013
- Sonic/Mega Man X Free Comic Book Day 2014
- Sonic Boom: Shattered Crystal Digital Comic
- Sonic/Mega Man Free Comic Book Day 2015
- Sonic #1/4 is the very first Archie-produced Sonic comic to ever be published.
- While the comic itself was free, the "Sonic and the Secret Rings" special was distributed on a bonus DVD with copies of the game bought at specific Target retailers.