Saint Seiya: Meiou Hades Juuni Kyuu-hen
English title: Saint Seiya: The Hades Chapter - Sanctuary
Japanese title: 聖闘士星矢 冥王ハーデス十二宮編
Alternative titles: Saint Seiya Hades, Saint Seiya: The Hades Sanctuary Chapter
Type: OVA
Source: Manga
Episodes: 13
Status: Finished Airing
Aired: Nov 9, 2002 to Jul 25, 2003
Duration: 29 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Toei Animation
Genres: Action, Adventure, Fantasy, Sci-Fi
Themes: Mythology
Demographics: Shounen

Hades is planning to take over the world, to achieve that goal, he sends out deceased Gold Saints to take Athena's head. Seiya and the other Bronze Saints come to help but their help isn't appreciated by the remaining Gold Saints that are still alive. 

(Source: ANN)