Choujigen Game Neptune The Animation: Yakusoku no Eien - True End
English title: Hyperdimension Neptunia: The Eternity (True Ending) Promised
Japanese title: 超次元ゲイム ネプテューヌ THE ANIMATION 約束の永遠（トゥルーエンド）
Type: OVA
Episodes: 1
Source: Game
Genres: Action, Comedy, Fantasy, Sci-Fi
Studios: David Production
Producers: Frontier Works, Media Factory, Animax, Idea Factory, MAGES., Cinema Sunshine
Duration: 24 min
Rating: PG-13 - Teens 13 or older

Unaired episode 13 of Choujigen Game Neptune: The Animation, included in the 7th BD/DVD volume.