Halo Legends is a oNA (web) anime that premiered in fall 2009, produced by bones.

About the production: the story comes from a video game, there are 9 episodes of about 13 minutes and its current status is "finished".

Its main genres are action, drama and sci-fi, with themes such as Military, Conspiracy, Aliens and Anthology.

On AniList, Halo Legends has an average score of 66%, a good score, and appears on 9,455 users' lists.

This sweeping science-fiction saga delves into the rich Halo universe with 7 exciting stories including tales of Master Chief's mysterious origins, the Spartans' advanced combat capabilities and the tense rivalry between Spartans and Orbital Drop Shock Troopers (ODSTs). (Source: Warnervideo.com) 1) Origins Part1 (STUDIO 4℃) 2) Origins Part2 (STUDIO 4℃) 3) The Duel (Production I.G) 4) Homecoming (Production I.G/BEETRAIN) 5) Odd One Out (Toei Animation) 6) Prototype (Bones) 7) The Babysitter (STUDIO 4℃) 8) The Package (Shinji Aramaki) Note: Since The Package aired in two parts on Halo Waypoint and Origins has two parts the total number of episodes is 9 for the 7 stories. 5 of the 9 episodes aired online, making Halo Legends technically an ONA.

Official synopsis from AniList.