The Elder Scrolls IV: Oblivion/Walkthrough

Oblivion does actually have a main quest, but if you're anything like me you'll ignore it for a few weeks while getting that new sword or reputation with your guild. The main quest is always there to work on, but it's not required at all.

killing the emporer
The game basically starts with you in bruma. The bruma guards go through a passageway that leads right through your house allowing you to kill them. Once you kill them off. The count will then go over to you and arrest you and the guards will tell you to stay put. Talk to the person in your cell and he will be set free so you just have to go to sleep and you are out of your cell.

Now that you've got out of jail go to the impearial city and go to the emporerstower and go to the guard and ask to see the emporer so all now that you have to do is kill him.