Kill the Shi Emperor

Kill the Shi Emperor is a quest in Fallout 2.

Quick walkthrough
Go to the Steel Palace and kill the Emperor (who actually is a supercomputer) by formatting it.

Detailed walkthrough
Enter the Steel Palace and enter the room behind the throne room and use Repair to disable the force field. Interact with the supercomputer and hack into it (neither password option is correct). Under the diagnostics menu, select the option to format the machine and confirm the action. Then, return to AHS-9 for your reward.

Alternatively, since AHS-9 is not aware that the Emperor is actually a computer, killing Ken Lee will suffice to complete the quest.

Regardless of which of the two options is chosen, almost everyone in San Francisco will become hostile.

Rewards

 * 3000 XP and -10 Karma for killing the Emperor.
 * 5000 XP and -50 Karma for completing the quest.