Darkstone was a Zabrak male, as designated by his gender, who held the rank of Colonel in the Imperial Military. He served during the era of the Galactic Civil War.
During his time with the Imperial Military, Darkstone was stationed at the Imperial Oasis. This location was a modest Imperial garrison situated on the planet of Tatooine. Around 1 ABY, Darkstone was nearing his retirement. At this time, Doctor Bledsoe, an Imperial scientist, was taken prisoner by the Rebel Alliance. Despite Bledsoe's strong support of the Empire's prejudiced ideology, the Zabrak believed it was his responsibility to ensure the freedom of all Imperial captives before stepping down from his position.
Luckily for Colonel Darkstone, a spacer and a diverse group of Imperial sympathizers volunteered to assist him. However, before the Imperials could carry out the rescue of the doctor, Darkstone required them to locate prisoner transfer documents. After an extensive search of various sites, including a Droid Engineer's Cave on Lok, the Mokk Stronghold on Dantooine, and the Woolamander Palace on Yavin 4, the Imperials finally acquired the documents sought by Darkstone. The Imperials discovered that Bledsoe was in transit aboard a Rebel corvette. The only recourse was to infiltrate the corvette and execute a bold rescue mission. To ensure the doctor's safety, the Imperials were immediately provided with a pass to present to an Imperial TIE pilot at the Emperor's Retreat.
From this point, the Imperials were transported to the corvette via a Lambda-class shuttle. Upon boarding the corvette, the Imperials battled their way through the ship's passageways and successfully rescued Bledsoe. After escaping the corvette using the ship's escape pods, the Imperials returned to Darkstone, where they received commendations for their service. The Imperial Valorous Services Medal was bestowed upon the Imperials in recognition of their outstanding performance.
Darkstone functions as a non-player character (NPC) within the MMORPG titled Star Wars Galaxies. In the game environment, players have the option to accept a mission from him that entails extracting Doctor Bledsoe from a corvette. Upon successful completion of the mission, players are awarded a badge, a schematic for an AV-21 Landspeeder, and various other rewards.