Synopsis taken from Nathan
Butler's Star Wars Timeline Gold, www.starwarsfanworks.com/timeline.
In a Halowan Laboratories lab, IG-88 comes online
for the first time, and the sentient programming he was
given rushes through his system like a brushfire, making
him even more sentient than planned. After killing all
of the technicians when they try to shut him down, IG-88
dubs himself IG-88A and loads his sentient program into
the three other IG-88 droids in the room, creating
duplicates of himself (IG-88B, IG-88C, and IG-88D).
IG-72, an inferior model, is activated but retains its
programming. The five assassin droids, after downloading
all information in the labís computers, escape the
base, and the IG-88s go one direction while IG-72 goes
another. Imperial Supervisor Gurdun arrives at the lab
and learns that the most dangerous droids in the galaxy
are now running loose. The IG-88s head for the droid
factory world Mechis III and load their program onto the
planet, effectively making the droids revolt and murder
the workers and administrator (Hekis Thul), before
landing on the world and taking it over, using fake
transmissions to make it appear that all is normal. From
here IG-88 wishes to prepare an army of droids with
sentient programming buried inside them to be activated
at an appropriate time and take over the Empire. In
order to make sure that IG-88 remains visible and thus
no one comes to Mechis III looking for them, IG-88B is
sent out into the galaxy to perform as a bounty hunter
(but also to use that cover to track 484 down anyone
involved in the IG-88 creation project and murder them
so as not to have any loose ends). The first mission
takes IG-88B to Peridonís Folly, where his secondary
target is Bolton Kek. One down, a very short list to go.
Darth Vader and Gurdun arrive on Mechis III to check on
the progress of probot production, unknowing that the
facility is under the control of IG-88. After being
assured by a false hologram of Hekis Thul, Vader leaves,
satisfied. Shortly thereafter, IG-88 checks in with his
various droids in the Empire and learns of the existence
of the Executor. He begins scheming to make the Super
Star Destroyer his own.
As the probe droid on Hoth discovers the existence of
the Rebel base, it transmits its data to the Empire, but
also to Mechis III, where IG-88 takes it as a prime
opportunity to see the Executor in action.
IG-88B, after observing the Battle of Hoth but not
interfering, decides to lurk around until Darth Vader
issues a call for bounty hunters to chase Han Solo,
which is only logical.
IG-88 B attends the bounty hunter ďmeetingĒ aboard
the Executor and then digs into the shipís files,
where he learns of the construction of the Death Star
II. He transmits details back to Mechis III, where
IG-88A and the other two confer, deciding that they
should make a duplicate computer core for the Death Star
II with IG-88ís sentience inside, which could then
take over the station at a later time. At the same time,
Gurdun is assigned to go with the real core to the
IG-88 learns that Boba Fett has located Han Solo, so
IG-88B goes to Cloud City. There, he wants to ambush
Fett and take Solo, but Fett destroys IG-88B instead. On
Mechis III, IG-88A sends IG-88C and IG-88D after Fett.
IG-88Aís fake Imperial ships destroy the convoy
bearing the real Death Star II computer core, along with
Gurdun. The fake Imperial ship and the duplicate core
(with IG-88ís sentience in it) is shipped the rest of
the way to the Death Star II.
IG-88 happily witnesses the Battle of Endor from inside
the Death Star IIís computer core. He decides that it
is no longer time to wait for sending the order to begin
his droid revolution, unknowing that the station (and
IG-88ís sentience) is to be destroyed by the Rebels
before the order can be sent.