With the release of the first Zone of the Enders title, Sunrise produced an OVA based on the events that occured before Zone of the Enders. [ZOE 2167 Idolo section]
The ZOE anime series, Dolores,i, takes place after the events in 2167 Idolo. It introduces characters and story outside of the ZOE games. [ZOE Dolores,i section]