Attack on Titan takes place in a world where humanity has been forced behind massive walls to protect themselves from enormous Titans - gigantic humans with a taste for human flesh. Environment = The world of Attack on Titan is a harsh and unforgiving one, with humans living in fear of the Titans that could come at any time. The world is filled with ruined cities, abandoned towns, and harsh wilderness. Races = The world of Attack on Titan has only humans and Titans