User blog:James144/Finish the main quest really fast.

This is, without a doubt, the coolest glitch I have found in Oblivion.

First of all, note that I play the PS3 version. I don't know if this works on other platforms.

REQUIREMENTS: You will need to have VERY high Acrobatics. (Mine is 168, thanks to a glitch I found involving the Boots of Springheel Jak, whereby I can't equip them, they weigh nothing, I can't remove them from my inventory, yet I still get the +50 Acrobatics bonus. If you want to know more about that, I'll post it later. It's completely safe and causes the game no problems.) You will also need to have broken the Siege of Kvatch but not yet have brought Martin to Weynon Priory. So Oblivion gates haven't started opening, you've met Martin, and you can jump really far. Alright?

Here's how it works. Go to the Temple District of the Imperial City. Go to the south-east corner and jump onto the wall and then up onto the roof of the South Watchtower. From here, jump onto the roof of Salomon Geonette's house and make your way to any point on the rooftops that is close to the Temple of the One. Now, take a running start, and jump onto the roof of the Temple. You won't land on the roof but will instead fall through, leaving you inside the Temple.

The walls will be opaque and it will seem that there is no way out. However, if you look carefully, there is a small portal marked "Door to Temple of the One" just in front of where the door to the Temple appears to be. Enter this. You will find yourself in the Temple, lit up in ominous red. Leave through the front door. You will get a message saying "Mehrunes Dagon is here!, etc". Now keep yourself safe from the Daedra hordes by jumping up to the rooftops again. Wait for ages (seriously, go read a book or something). Martin will eventually show up and talk to you. Go with him to the Temple and watch as you complete the main quest, without any Oblivion gates opening anywhere in Cyrodiil!

I still haven't explored the ramifications of this glitch properly. I recommend doing it in a seperate save file in case it all goes pear-shaped.

One great advantage of is that you can keep all your rewards from the Daedric quests. However I don't know if Hermaeus Mora will be available.