Kidou Senshi Gundam Senki: Avant Title
English name: Mobile Suit Gundam Battlefield Record: Avant-Title
Genres: Sci-Fi
Type: ONA, Episodes: 1
Aired: Sep 3, 2009
Studio: Sunrise
Source: Game
Rating: PG-13 - Teens 13 or older
Synopsis:
A short animation serving as a prequel to the events depicted in the PlayStation 3 game, Mobile Suit Gundam: Battlefield Record U.C. 0081.

(Source: AniDB)