The Duel
An Arbiter named Fal does not want to follow the Covenant religion. One of the Prophets accuses Fal of heresy. Fal will not yield and the Prophet is forced to send another Elite to kill his wife in order to drag him to a trap.
Aired 21/11/2009EP 2 - The Duel
Halo Legends
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.