Unofficially, the most notable star cluster in the Terminus Systems, taking its name as it does from the Omega space station, unofficial capital of the Terminus. Most worlds here are in Omega's shadow, but there is a great variety of interests represented, including worlds under the jurisdiction of the former Batarian Hegemony and its successor, the Batarian Confederacy, volus and elcor colonies, and krogan clan rule.
- Al'Hanon System: Al'Hanon
- Amada System: Takkan, Karora, Eingana, Alchera, Anjea
- Arinlarkan System: Utha
- Batalla System: Logasiri, Thunawanuro, Nearog (Ressamun Quits)
- Eris System: Gelai
- Fathar System: Lorek, Korar, Dorgal
- Kairavamori System: Sehtor, Vatar, Uwan Oche
- Nurok System: The Wreck
- Sahrabarik System: Urdak, Omega, Imorkan (Hanoa Station), Bindur
- Sharak System: Eldraam
- Vinoss System: Shelba
- Yomuuk Belt
Independent colonies in the rimward Omega Nebula are currently being menaced by the Imperial Dominion of Al'Hanon.
See detailed description of the cluster here.