Kill the AHS-9.

Kill the AHS-9 is a quest in Fallout 2.

Detailed walkthrough
Ken Lee of the Shi has one final assignment for the Chosen One in order to grant him an audience with the Emperor: kill the leader of the Hubology cult, AHS-9, the Great and Terrible. The target resides in the cult's compound near the Golden Gate bridge and can be reached by asking AHS-7 to see him or disabling the energy forcefields.

After breaching the outer defenses, its a straight path to the head nutjob's office. Killing AHS-9 can be done through combat (this turns the entire compound hostile) or with the patented SuperStim method. Either way, you have to get out of the Hubologists' base and back to Ken Lee for your reward.