IG-88 assassin droid/Legends

IG-88 was designed by Holowan Laboratories to be an assassin droid. When he was activated, he gained sentience almost immediately, then proceeded to destroy his makers, copy his programming into three other IG-88's (and one IG-72), and escape with a ship.

The four IG-88's, designated 'A' through 'D', worked as a team, while IG-72 went his own way. They worked as bounty hunters, and were commissioned in The Empire Strikes Back to find the Millennium Falcon. Their ship was the IG-2000.