Doisac

(All of the above information provided, courtesy of the Halo 3 Beastarium included with the Halo 3 Limited Edition.)

Doisac is the name of the Brute homeworld. It possesses three satellites, namely Warial, Solrapt, and Teash, and is the fourth planet of the Oth Sonin system.

Doisac's environment is much the same as Earth's (although completely covered in tropical rain forests), though it has been noted that its environment is dominated by magma and magnetism. Its shape and color is like that Earth and Eayn. However, the left-side is covered red, presumably by lava.

The statement that Doisac is "Native Tier 4" refers to the "tiers of technological achievement" noted in the same Beastarium. These tiers range from Tier 0, or "Transsentient", which refers to a race of beings known as the Precursors and serves as a theoretical ceiling, down through various technological "milestones" to Tier 7, or "Preindustrial", referred to as "one of the most common and stable states (of civilization), with limited weaponry and environmental threats." Thus the Brutes had achieved Tier 4 (Space Age) levels of technology before becoming integrated into the Covenant's Tier 2 (Interstellar) technological systems.