Isn't negotiation the Jedi way? Trophy

After you finish the missions "Castle of Doom" and "Hostage Crisis", you can undertake bounty hunter missions by visiting the Hutt character on the Invisible Hand. This is located by going through the door you entered to get access to the "Hostage Crisis" level.

Select a character to be your bounty and then complete the mission. Complete all missions to unlock this trophy.

Batmaster has posted a brilliant thread, listing all the locations of where you can find your bounties: Bounty Hunter mission locations