Based on the R2 and R7-series, the Q9s were launched without sufficient testing, according to the statements of critics. One of the most famous droids of the Q9-series was Q9-X2, who over-modified himself with an array of gadgets and gizmos. Kyp Durron also owned one, called Q9-01.
- Ambush at Corellia (First appearance)
- Assault at Selonia
- Showdown at Centerpoint
- Agents of Chaos II: Jedi Eclipse
- Dark Journey
- Enemy Lines I: Rebel Dream