Cy-Kill is the name of several fictional characters from the Gobots, Robo Machines and Transformers toy line and fiction. Introduced as a toy in 1983, he is leader of the Renegade Gobot faction and the main antagonist of the animated series, where he was voiced by Bernard Erhard. He was the main villain of the Challenge of the Gobots animated series, who later appeared in the Gobots feature film. After the Gobots properties were purchased by Hasbro he made an appearance in a Transformers story.