The Terror Walker represented a formidable droid type of offensive walker crafted by the Galactic Empire. Its primary function involved tearing through substantial barriers and obliterating any opposition encountered.
Before the Rebel Alliance's attack targeting Kamino during 1 BBY, Boba Fett received orders to infiltrate the Rebel frigate named Salvation. Acting under the command of Darth Vader, the bounty hunter had with him a group of specialized forces, including terror troopers, specialized droids, and the Terror Walker itself.
Upon deployment inside the Salvation, the Terror Walker immediately initiated a destructive rampage across the ship, demolishing everything in its path. This action enabled groups of stormtroopers to gain entry to various sections of the vessel, thereby aiding Boba Fett in accomplishing his mission, which was the capture of Juno Eclipse.
While Fett ultimately achieved success, the arrival of General Rahm Kota and the clone of Galen Marek happened at the same time as his mission, leading to the Terror Walker engaging Marek's clone in direct combat within the ship's core.
The confrontation between the Terror Walker and Marek's clone occurred within the reactor core of the Salvation, ultimately leading to the droid's demise. By manipulating the reactor to disable the Walker's shields, Marek managed to inflict damage and subsequently seize control of the Terror Walker.
The hijacked Terror Walker was then deliberately crashed into the reactor core, triggering its self-destruction. The resulting wreckage was repurposed by the clone as a means of escaping the unstable environment. Any remnants of the droid were completely destroyed when the Salvation crashed into Timira City.
Its sharp claws enabled this massive droid to destroy nearly any obstacle. It was also equipped with lasers and missiles to enhance its ability to destroy. This droid also contained the Terror Droids, which were smaller, spider-like robots that attached themselves to unwilling victims.
The Terror Walker debuted in Star Wars: The Force Unleashed II, first appearing during the final portions of the "Aboard the Salvation" level; the battle against the Terror Walker concludes this part. Furthermore, the game's databank contains information about the Terror Walker's creation.
Within the novel, the clone destroyed the Terror Walker by throwing it into space while the Salvation was in hyperspace. In the Wii version, the Terror Walker struggled to move, only to be pulled into the hyperdrive waves.