A-77, once a mining installation for asteroids situated in the Unknown Regions, was repurposed by the Sith Empire into a prison. This highly secure facility, A-77, was constructed within an asteroid, maintaining a concealed location until the time of the Galactic War against the Galactic Republic, when Sergeant Ava Jaxo managed to get inside. Nevertheless, what was intended as a rescue operation to free over three hundred inmates was actually a carefully planned ambush orchestrated by General Arkos Rakton and set for Havoc Squad. Despite Havoc Squad's success in freeing the prisoners, Jaxo met her death during the mission.
The Trooper class mission called "Objective: A-77" in the video game Star Wars: The Old Republic, which came out in 2011, features A-77.