OG-9 homing spider droid

The OG-9 homing spider droid also known as Spider droid was a model of large, four-legged battle droid manufactured by Baktoid Armor Workshop. They were used by the Confederacy of Independent Systems during the Clone Wars, notably during the Battle of Geonosis and Battle of Felucia.

Characteristics
A gigantic walker utilized by the Commerce Guild and the Confederacy of Independent Systems, the Baktoid Armor Workshop OG-9 consisted of a spherical body suspended between four mechanical legs. Mobilized by a powerful reactor at the heart of its central body, the homing spider droid moved slowly on its long mechanical legs, although also maintained an imposing mix of speed and destructive power; the droid was armed with dish-shaped laser cannons in the form of a top-mounted laser emplacement, which released sustained-fire shots to quickly wear down an enemy deflector shield, and a bottom-mounted cannon to keep infantry units at bay.

Before the Clone Wars and Geonosis
Before the Clone Wars, the OG-9 homing spider droid saw use by the Commence Guild, which comprised several notable corporations in the galaxy, for contact enforcement, but shortly prior to the start of war the Commence Guild joined the Confederacy of Independent Systems. The homing spider droid became part the Droid Army of the Separatists, which included battle droids of groups like the Commence Guild, Trade Federation, and Techno Union.

The start of the Clone Wars was the Battle of Geonosis, which saw 7,000 homing spider droids used to devastating effect by Separatist forces. Combating ground forces of the Grand Army of the Republic, OG-9s attacked All Terrain Tactical Enforcers and clone trooper formations on the battlefield.

Continued conflict
The homing spider droids were used throughout the Clone Wars. During the Battle of Mimban, homing spider droids saw use among Separatist forces against the Republic, and during part of the fighting homing spiders droids and other battle droids engaged the Republic's 501st Legion and Mud Jumpers. Clone Captain "Rex" ordered for the 501st to advance and for the Mud Jumpers to back up Jedi General Laan Tik. Tik instead stated that they could take care for them-self, and "Rex" called for clone trooper "Hardcase" to get Senator Jar Jar Binks, who had been brought to interface with the local Mimbanese, out of danger. However, General Tik was struck and killed, and the chain of command fell to Binks. Binks was near Tik's corpse and told it "thessa muy muy bombad" as a homing spider droid fired. "Rex" ordered for a retreat from the current battle. The captain told "Hardcase" to lay down covering fire and told "Jesse" to get Binks to safety.

In 19 BBY, several homing spider droids were fielded on Felucia alongside Armored Assault Tanks during a battle against the forces of Jedi General Aayla Secura. However, the droid forces of the Separatists would be shut down not long after.

Behind the scenes
The OG-9 homing spider droid first appeared in Star Wars: Episode II Attack of the Clones. In post-production of that film, the droid was simply referred to as "Commerce Guild droid B."

Appearances

 * Star Wars: Galactic Defense
 * Star Wars Battlefront II
 * Star Wars: Episode II Attack of the Clones
 * Star Wars: Episode III Revenge of the Sith
 * Star Wars: Episode III Revenge of the Sith