IG-88B, pronounced Eyegee-Eightyeight, also commonly known simply as IG-88, or as a Phlutdroid, was a rogue, deadly masculine IG-series assassin droid manufactured by Holowan Laboratories who worked as a bounty hunter. Following the Battle of Hoth, he and several other bounty hunters were summoned by Darth Vader to the Executor and hired to track down the Millennium Falcon and its Rebel crew. Unable to track his quarry, IG-88 trailed his chief rival, Boba Fett, to Bespin, where the bounty hunter nearly destroyed the assassin droid; however, IG-88 managed to survive. At some point IG-88 undertook a software infiltration into Death Star II, but his plan was single-handedly thwarted by R2-Q5. Decades later, the droid met with mercenary Bazine Netal to speak about the location of the Millennium Falcon.

IG-88 carried an arsenal of weapons, including blaster rifles, pulse cannons, a DAS-430 Neural Inhibitor and a needle dart gun that launched poison darts. However, his most dangerous weapons were hidden inside his slender frame, including a flamethrower, a sonic device and toxic gas dispensers. IG-88 also wore an ammunition bandolier that carried his concussion discs and vibroblades. As an IG-series droid, he was designed to have blasters built into each arm, installed sometime prior to the search for the Millennium Falcon. IG-88 owned a modified Aggressor-class Assault Fighter called the IG-2000.