The Breegus System was a star system at the very edge of the Polaris Galaxy. The Breegus Nebula was its entrance. It was close to the center of the universe, as the Great Clock, which was at most 50 ft away from the exact center, was located here. The Breegus System was free from the iron fisted rule of Tachyon and thus did not suffer. However, the system was generally lawless, and crawling with mercenaries and petty tyrants. Polaris Galactic Government did have a small influence here, as Terachnos was aligned with them; however, due to time anomalies, was too busy to stop Nefarious forces from occupying Terachnos.
It was here that a number of significant events occurred during Ratchet's search for Clank, who had been kidnapped by Doctor Nefarious after he initiated a new plan to take over the Great Clock after being defeated by the duo and Captain Qwark in the Solana Galaxy. Many groups and races including the Fongoids, Vullards, Agorians, Terachnoids, Valkyries and Nefarious Troopers were encountered in the Breegus System. General Azimuth retreated to the system in exile after Emperor Tachyon's attack on Fastoon and the disappearance of the Lombaxes. Captain Darkwater was also known to have visited the Breegus Star Cluster.
The Breegus Nebula was located in the Polaris Galaxy. It led into the Breegus System at the edge of the galaxy and was located just east of the Phylax Sector. Ratchet received coordinates to the nebula from the computer of an Obsidian Eye on planet Merdegraw. He promptly flew through it in the Aphelion alongside Captain Qwark and entered the Breegus System in order to find his lost friend, Clank, who was held captive in the Great Clock by Dr. Nefarious.
- Breegus Minor was mentioned in Ratchet & Clank Future: Tools of Destruction located in the Breegus System.
- Throughout A Crack in Time, players could see the remains of space pirates who had attacked a Vullard's junk hauler.
- Ratchet & Clank Future: Quest for Booty
- Ratchet & Clank Future: A Crack in Time
- Ratchet & Clank: Before the Nexus