Harlock Saga: The Ring of the Nibelung is a oVA anime that premiered in winter 1999.

About the production: there are 6 episodes of about 30 minutes and its current status is "finished".

Its main genres are adventure, drama and sci-fi, with themes such as Pirates.

On AniList, Harlock Saga: The Ring of the Nibelung has an average score of 63%, an average score, and appears on 2,123 users' lists.

The franchise continues in or follows from: Uchuu Kaizoku Captain Harlock and Maetel Legend.

Captain Harlock is drawn into a saga of intergalactic proportions when the son of a deceased comrade unwittingly forges the Ring of the Niebelung. Evil forces gather to wage war against the last remaining superpowers of the galaxy led by a demented outcast. Harlock must counter the amassed armadas that threaten the last gods and recover the ring before Paradise is lost. (Source: Anime News Network)

Official synopsis from AniList.