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Even though he was tasked with Killing Dash Rendar he still had plans to confront Boba Fett later on and take back Han Solo from Boba Fett. In the next assignment he was instructed by Darth Vader to Capture or Kill Dash Rendar. After Han Solo was captured IG-88 was given another assignment.
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However, it was Boba Fett who tracked down Solo in the Millennium Falcon. He and several others were summoned by Darth Vader to the Executor after the Battle of Hoth, and ordered to fulfill the bounty on Han Solo. IG-88 was an assassin droid-turned-bounty hunter. IG-88 was a boss that faced the game player of Dash Rendar at some point just after the Battle of Hoth, during the Galactic Civil War in Star Wars: Shadows of the Empire.
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