Terror Droids were small spider-like droids that were developed during the reign of the Galactic Empire under the direction of Darth Vader on the planet Kamino.
Starkiller being attacked by a swarm of Terror Droids.
Following the escape of a clone of Galen Marek, Vader dispatched the bounty hunter Boba Fett to track down the clone's progenitor's love Juno Eclipse. Taking a number of Imperial resources, Fett struck the Rebel starship Salvation and deployed a large contingent of Terror Droids to deal with the Rebel troopers onboard. The droids later encountered Starkiller who had arrived to save Eclipse from the Imperial attack. It was later revealed that these spider droids came from the Terror Walker, their larger counterpart.
These Terror Droids originally had multiple colors, depending on their type, but the default "yellow" droids are fought in combat. However, hordes of "red" explosive Terror Droids can be seen in one hidden area of the ship with a hidden Holocron. These are only seen once and they explode when an intruder is near their proximity. However in the Nintendo Wii version, "green" Terror Droids will lunge at Starkiller and grapple onto him, whereas "orange" ones will jump at him and explode, knocking him down