Terraberserkers were a humanoid species originating from the Cadonian Belt. At least one Terraberserker attended the Festival of Offerings at the Pyramid of the Rings of Akhaten at least once.
One Terraberserker was familiar with the Doctor, and exchanged some form of greeting with his eleventh form. The greeting consisted of grunting and shaking their heads in front of each other, hitting each other's left hands with their right one, hitting each other's right hands with their left one, then stretching out their lower bodies. (TV: The Rings of Akhaten)