Attack on Titan Wiki:Canon Policy

The canon material is the content accepted as part of the official story of Shingeki no Kyojin (Attack on Titan) and which takes place in the same continuity of the original series, the manga.

Basically, only content made by series creator Hajime Isayama is accepted as canon, while derivative material from other authors is intended to take place in alternative continuities and therefore is considered non-canon; unless it's specifically adopted by Isayama into the main continuity.

Below is a comprehensive list of the material considered as canon and non-canon:

Canon


 * Manga
 * Guidebooks
 * Statements by Isayama in other media (his blog, interviews, etc)

Non-canon
 * Anime
 * Novels
 * OVAs
 * Video Games
 * Movies
 * Fanfiction