For the final installment in the "Halo" trilogy, "Halo 3", designers had to refine the Covenant for the move to the more powerful Xbox 360 hardware. Bungie was dissatisfied with the Brutes in "Halo 2"; they were added late in development, resulting in the Brutes functioning merely as "damage sponges" and "not interesting to fight". Their design was also limited, being little more than hairy apes with bandoliers (reminiscent of the "Star Wars" character Chewbacca). With the Elites leaving the Covenant in the game's story, the Brutes became the player's main enemy, necessitating radical changes in the character's behavior and design. For the new look of the Brutes, concept artists took inspiration from rhinoceroses and gorillas. The designers added armor with buckles, gauntlets, and leather straps to bring them more in line with the Covenant aesthetic. The more seasoned the Brute, the more ornate its clothing and helmet; the armor was designed to convey a culture and tradition to the species, and emphasize their mass and power. Designs for "Halo 3" took cues from ancient Greek Spartans. Character animators recorded intended actions for the new Brutes in a padded room at Bungie. A new addition to the Brute artificial intelligence was a pack mentality; leader Brutes direct large-scale actions simultaneously, such as throwing grenades towards a player.