Fabula Nova Crystallis Final Fantasy (Japanese: ファブラ ノヴァ クリスタリス ファイナルファンタジー, Hepburn: Fabura Nova Kurisutarisu Fainaru Fantajī) is a series of games within the Final Fantasy video game franchise. It was primarily developed by series creator and developer Square Enix, which also acted as publisher for all titles. While featuring various worlds and different characters, each Fabula Nova Crystallis game is ultimately based on and expands upon a common mythos focusing on important crystals tied to deities. Each of the central games—Final Fantasy XIII, Final Fantasy Type-0 and Final Fantasy XV—has a varying level of connection to the mythos, ranging from direct usage to thematic reference.