Bot-drones were a kind of drone craft that were controlled remotely by a pilot. These devices were originally created for use by the Galactic Empire, but the project was canceled because the technology was unreliable. Consequently, some bot-drones ended up in the possession of Wef, an arms dealer who frequently collaborated with the Hidden Hand crime organization. An agent of the Rebel Alliance named Rebak sought to buy the bot-drones, but Beilert Valance's crew of bounty hunters intended to utilize them in their hunt for Darth Vader. During a battle with Imperial TIE fighters, the slicer Chio Fain flew the bot-drones, combining them into a single wedge formation before crashing them into the command tower of the Star Destroyer called Formidable.