Erfworld was a story-driven fantasy/comedy webcomic and independently published graphic novel about a master strategy gamer summoned into and stuck inside a wargame running from December 2006 to its abrupt cancellation in October 2019.

Erfworld's plot, setting, and characters were released under a Creative Commons Attribution, Noncommercial, ShareAlike license.

"[14] The addition of Erfworld to GiantITP was noted in "First Watch", Dragon magazine's monthly section on new developments in gaming and entertainment.

The fifth book, left incomplete when Erfworld was discontinued, focused on a completely different side in another part of the setting, and did not address Parson's situation at all.

Erfworld was an early pioneer in crowdfunding, featuring the Toolbox, a Patreon-like funding mechanism that was created specifically for the comic and its site.

In the same news post Rob explained that an undisclosed personal tragedy had occurred and, as a result, Erfworld would not be updating again "for the foreseeable future, possibly the rest of the year."