Prison-99 was the main penitentiary of the Galactic Republic prior to the establishment of facilities on Tentator and Oovo IV. It was a terraformed world where inmates farmed the land to provide for their own sustenance. It was in System 99. Deriac and Gupa were once imprisoned on Prison-99 but were rescued by Basrin and Odogoth. Their cell-mates included a two-headed Ithorian scoundrel who had been genetically altered.