Specials from Galaxy Angel 3 DVDs.

Six years have passed since Rion discovered his own identity as an artificial being, yet succeeded in destroying the genocidal Mother Computer, Dorothy, before perishing himself. Now reactivated by Lilia, Rion awakens to find that Dorothy managed to execute one final catastrophic program, rendering a new evil crew to finish her goal of human annihilation. It is a fully 3D CGI animated OVA based on the hit PlayStation game, called Galerians, released in August, 1999. (Source: AniDB)

Despite having seemingly returned to their normal lives, Kei Kurono, Masaru Katou, and Kei Kishimoto are forced back into the lethal game after Gantz's recent activity. The black sphere continues to summon recently deceased people to fight alien invaders. And having survived the two previous encounters, the trio are more than prepared for the upcoming missions. As they progress through the tournament's stages, the three proceed in their attempt to earn 100 points, which is said to be the only way to leave the parallel dimension for good. However, with the constant onslaught of alien invaders and the threat of imminent death, they must first focus on the task at hand—immediate survival.