Omega was created as an alternative to the series' direct sequel Saint Seiya: Next Dimension due to lack of material to adapt. The series also got a manga adaptation and a fighting game.

For the second season, the series tells the conflict between Athena and her sister Pallas which starts a new war. As the Pegasus Bronze Saint, Koga embarks on a journey to increase his power to save Athena while meeting some other Saints. The series follows a young teenager known as Koga who becomes one of the 88 warriors protecting the Goddess Athena known as Saints.

The series began broadcasting in Japan on TV Asahi on April 1, 2012.

It is a spin-off of the Saint Seiya anime series written and illustrated by Masami Kurumada, produced in commemoration of the 25th anniversary of the franchise. Saint Seiya Omega ( 聖闘士星矢（セイントセイヤ） Ω （オメガ）, Seinto Seiya Omega, stylized as Saint Seiya Ω) is an anime series produced by Toei Animation. Cover of the first release of Saint Seiya Omega featuring Pegasus Koga and Sagittarius Seiya.

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