Centratus is arguably the largest island on Saaristo, and positioned roughly in the centre of the archipelago.
Much of the natural environment on Centratus has been destroyed, to make way for Sagax cities. The island has a strange shape; a somewhat circular main part, and a long strip of land extending northwards from the northmost point of the island.
The Sagax are virtually the only inhabitants, having wiped out most other races on the island. Realising the error in this, they set up wildlife preserves on other islands, and converted to being largely vegetarian.