Wikipedia
Diebuster
Diebuster, also known as and Gunbuster 2, is a six-episode original video animation series directed by Kazuya Tsurumaki, written by Yōji Enokido and animated by Gainax. It was created to commemorate the studio's 20th anniversary in 2004, and it is a sequel to their 1988 OVA Gunbuster.
A compilation movie, titled , that condenses Gunbuster and Diebuster into two feature-length movies, was released on October 1, 2006.
It was licensed for American release by Bandai Visual USA as Gunbuster 2. Discotek Media has since re-licensed Diebuster as Gunbuster 2: Diebuster and it was released on May 21, 2013. A manga adaptation of the series is available in Japan.