The only achievements I don't have for Skyrim are 3 Dawnguard achievements and the Oblivion Walker. Oblivion Walker requires you to get 15 Daedric Artifacts for those of that didn't know. These are the one I have; Ring of Namira, Ebony Mail, Ebony Blade, Spellbreaker, Masque of Clavicus Vile, Savior's Hide, Wabbajack, Sanguine Rose, Azura's Star, Volendrung, Oghma Infinium, Dawnbreaker, Skull of Corruption, and the Mace of Molag Bul. I can't get Mehrunes Razor because some reason he is dead. I their another Daedric Artifact I can get? Please help. Thanks!!

Edit: Do you have to have all Daedric Artifacts on one character?

Mace of Molag Bal?

Nevermind, I missed it in the OP.

I think i read somewhere that the skeleton key doesnt count with the achievement. im not sure tho.. but if it is then im screwed aswel...

sorry to say this, but u r screwed in this achivement.

also Skeleton key does not consider as part of achivement because it is part of theive's guild quest not daedra quest.

if you play PC you may able to revive the NPC up, if not... then i think you need to start the game again

You're saying Mehrunes Dagon is dead?

He fell to pieces in Oblivion.