A-77 was an asteroid mining facility in the Unknown Regions that was converted into a prison by the Sith Empire. A facility whose security was legendary, A-77 was built into an asteroid, and its location was kept a secret until the Galactic War with the Galactic Republic, when Sergeant Ava Jaxo infiltrated the prison. However, a rescue operation for the over three hundred prisoners turned out to be a trap set for Havoc Squad by General Arkos Rakton, though Havoc Squad successfully rescued the prisoners, Jaxo died in the process.