[3] The series generally focused on a small number of robots from each faction (Leader-1, Turbo and Scooter vs. Cy-Kill, Cop-Tur and Crasher) who were virtually ever-present with other characters seeming to rotate in "guest-star" roles.

In the series’ backstory, thousands of years ago on planet GoBotron, there lived a race of human-like organic beings called GoBeings.

His work done, the Last Engineer intended to retreat to a pre-prepared workshop elsewhere in the galaxy, but the Master Renegade stole his ship and escaped in his stead.

The Last Engineer placed himself into suspended animation beneath the surface of GoBotron, while above, the war continued to rage between the Guardians and the Renegades, now all encased in GoBot shells.

Leader-1 found the person he believed to be the Last Engineer, but Leader-1 had unwittingly released the Master Renegade (though he did repair Turbo to gain the Guardians’ trust).

On May 17, 2011, Warner Archive released Challenge of the GoBots: The Original Miniseries on DVD in Region 1 as part of their Hanna-Barbera Classic Collection.

[citation needed] The show spawned an animated, feature-length film GoBots: Battle of the Rock Lords which opened in theaters on March 21, 1986, a little over four months before The Transformers: The Movie (August 8).