Mission to the Oppressor

In 3643 BBY, during the Cold War between the Galactic Republic and the Sith Empire, the Sith Lord Tarnis was killed in a duel with a young Jedi Knight on the Republic's capital planet of Coruscant. However, Tarnis's father, Darth Angral, witnessed his son's death, and the elder Sith declared war upon the Republic and the Jedi Order in revenge, using information on the Republic superweapon initiative given to him by his son—who had been undercover as a Republic scientist before his death—to seize control of the Republic's superweapon projects. One of these projects was the Death Mark laser, which was being developed on the planet Alderaan, and Angral's apprentice Nefarid captured the weapon despite Jedi Master Orgus Din's attempts to defend it.

Din was the former teacher of the Jedi Knight who had killed Tarnis, and, after the former student rescued the Jedi Master from the ruins of the Mensaav Military Laboratory—the research facility that housed the Death Mark laser project—the two Jedi learned that Nefarid was randomly targeting Alderaanians with the Death Mark laser. The Imperial spy Aleyna Hark had been seen near the mountain compound of the Alderaanian noble Duke Horis Thul, and, while the Knight rushed to the compound to prevent Thul's assassination, Din claimed that he would track down Nefarid and the Death Mark laser. However, Din lied—following the call of the Force, he located Angral's warship, the Oppressor, on the edges of the Alderaan system.

Deciding to put a stop to the crisis involving Angral, Din prepared to board the Oppressor and confront the Sith. When contacted by his former apprentice, Din confessed the truth, and he wished the Knight luck on confronting Nefarid in the Sith's stronghold. Din infiltrated the Oppressor before it left the star system, but he was only able to plant a homing beacon on the starship before he was detected by the vessel's security forces. Wounded, the Jedi Master was brought before Angral on the ship's bridge, and the Sith Lord broadcast a transmission of the events on the bridge across the entire HoloNet. Din's former apprentice had just attacked Nefarid's base on Alderaan, and the Sith decided to display the feed from the Oppressor in order to torment his opponent. Upon being presented with Din, with whom Angral had maintained a rivalry since the end of the Great Galactic War between the Republic and the Empire almost a decade earlier, the Sith Lord mocked his opponent's attempt and questioned whether Din was ready to die. Angral then stabbed the Jedi through the abdomen, killing his opponent.

Before departing the Alderaan system, Angral ordered Din's body to be shot into space, though a Republic shuttle later recovered the Jedi Master's corpse and returned it to the Jedi homeworld of Tython for a proper burial. Despite witnessing Din's death, the Knight defeated Nefarid in battle and destroyed the Death Mark laser. Angral then traveled to the Uphrades system, where he used his recently-constructed Desolator superweapon to attack the Republic agriworld of Uphrades—an action that killed millions of civilians. General Var Suthra of the Republic Military used Din's tracking beacon to locate the Oppressor, though Din's former student was unable to catch up to Angral until the Sith attacked Tython itself and forced a confrontation with the young Jedi.

Orgus Din's mission to the Oppressor first appeared in Star Wars: The Old Republic, a video game released by BioWare and LucasArts in 2011. During the Jedi Knight class mission "Facing Lord Nefarid," players witness Din's death before fighting Nefarid in his hideout.