This set of quests gets its own page because it is so wide-spread and kind of complicated. Performing these assassinations will earn you a lot of dark side points, so don't bother if you are a light side character. You can receive this quest as soon as you have collected one Star Map, and you can finish it at any time prior to travelling to the Star Forge. Note, if you haven't finished these quests and you take the dark side solution to gaining the Star Map on Manaan, you might not be able to complete these quests at all, since I think you are banned from Manaan unless you take the light side solution to gaining the Star Map.

Hulas

Sometime after you've found the first Star Map, you'll be approached by a Twi'lek named Senni Vek. He'll mention you dropped a datapad and give it "back" to you. Accept it and note it asks you to meet someone named Hulas on Manaan. Hulas is in the East Central Courtyard and you have to meet him alone (no party members with you). He'll introduce you to the secret assassin's guild known as the Genoharadan and say they are interested in you joining. If you are dark side, accept the initiation offers, which are to kill at least one of two persons. Once you've killed at least one, Hulas will give you the main set of three persons that must be killed.

Initiation Assassinations

Lorgal

Lorgal is a prisoner in the Republic Embassy, and you have to kill him in a way that looks like an accident. Enter the interrogation room and talk to him. You'll be offered the choice to kill him with any offensive force power at your disposal. Since I was playing a dark Jedi, I had both Kill and Drain Life at my disposal, so this was easy.

Zuulan

Zuulan is hiding out in the Matale estate on Dantooine. You won't be able to kill him if you have already collected three Star Maps, so either don't bother (his death is not necessary to advance this plot) or take care of it before collecting the third Star Map. Find his speeder parked behind the Matale estate on Dantooine and either a) plant a frag mine on the speeder or b) set off the speeder's alarm and, when Zuulan comes running, kill him.

Main Assassinations

Rulan

Rulan is a shapechanger hiding out in the Shadowlands of Kashyyyk. Check my Kashyyyk maps for the Shadowlands to see where Rulan is hiding, then look for a wookie corpse nearby. It has a datapad indicating a specific wookie is dead, and, lo and behold!, there that wookie is a few meters away. Tell Rulan the gig is up, then fight him through a couple of shapechanges. Eventually, he'll turn into a tach (monkey creature) and run away. Chase him down and kill tachs until you find the one that's him.

Vorn

Vorn is hunting krayt dragons on Tatooine. You'll find his assault droid in the Sand People area near the exit to the Eastern Dune Sea. Beat it down to disable it, then reprogram it to return to Vorn and kill him; or, you can just plant a frag mine in Vorn's speeder nearby. If you reprogram the droid, you'll follow it and help it kill Vorn.

Ithorak

Ithorak is a Selkath who deals with antiquities. Find his agent, Vek, in the swoop office on Manaan and pretend to be a buyer. Vek will set up a meeting in an unsecure area and you can kill Ithorak there.

Hulas (again)

After killing the three main persons, Hulas will rejoice that he is now sole leader of the Genoharadan. Seems he used you to set up and remove from power his fellow council members. If you want a piece of his dirty hide, you'll have to travel to Tatooine (again) and meet him in the Dune Sea, alone. Of course, you would never travel to such a meeting alone, which is a good thing, since Hulas brings six of his buddies along! He'll be waiting for you right outside the Anchorhead gate.

That's it for this series of quests. You get a nice set of +4 Strength gauntlets, a visor that gives you +3 Reflex and +2 Awareness (not so great) and a Stealth Unit that grants +8 Stealth (really nice for Mission, or you if you're a scoundrel). Not to mention lots of XP, dark side points and credits!