Back Issues was a feature that allowed Boomers access to copies of Sonic the Comic that were no longer sold in newsagents. Established around Issue 24 after being delayed for several issues, the service involved readers requesting older issues for a one-off payment. Popular issues such as Issue 1 and Issue 100 sold out quickly, although there were often several copies of non-consequential editions.
Back Issues now exists as a separate page on the Sonic the Comic Online. The feature allows for quick and easy access between all the online issues. A further update to the website following Issue 259 allows readers to select a character or series of choice, filtering out all but the issues that they feature in. Older copies of the print STC can be found on dedicated comic sites as well as on eBay, since Egmont no longer sells copies. STC Archive also existed as a location to find digital scans of the originals, until this was later closed.