"I think, therefore I am. I destroy, therefore I endure."
A robot that had more intelligence than its creators had thought. Actually, there are four IG-88's, but three of them were destroyed at a later time, Alongside IG-72 and the three other IG-88s (who were to be separate droids prior to IG-88 merging it's programming with them) It slaughtered all of it's creators and became a bounty hunter.
This is what the Empire thinks about IG-88. They don't really like him, even though Darth Vader hires him to capture Luke and the crew of the Millennium Falcon
IG-88, aka the Phlutdroid, is also reportedly operating as IG-88A, IG-88B, IG-88C, or IG-88D (having merged his programming with three other holowon IG assassin droids, thus operating out of four bodies simultaneously (though one was destroyed by Boba Fett, one by Dash Rendar, and one aboard the 2nd Death Star at the time of it's destruction) IG-88 was up to a very sinister plan to destroy all biological life on Ord Mantell, he had taken over a droid factory and had programmed every droid built in it under his watch with a kill command that would cause even the most harmless of droids to try to kill their biological owners.
IG-88 has many different types of weaponry, for different tasks.
IG-88's normal weaponry consists of a gas dispenser, gas grenades, a flamethrower, a sonic stunner, a pulse cannon, an ion blaster, a DAS-430 electromagnetic projectile launcher, a concussion grenade launcher, a flechette shard thrower, multiple blaster rifles, and a reflective palm that can deflect blaster shots.
With all these weapons, and a super fast computer mind designed for killing, IG-88 is a force that is to be reckoned with. Many have fallen to him and his ship, the IG-2000.
In Other Media
IG-88 was released as a Lego minifigure in the 2006 Lego set of the Slave I. He as also been a character in both the Lego Star Wars II: The Original Trilogy and the Lego Star Wars: The Complete Saga.