I bring great news today, I have 100% personal confirmation that you can miss exactly one Daedra Artifact (with a few caveats) and still receive the Oblivion Walker Achievement. I missed out on Clavicus Vile's mask because I stupidly believed him when he said I should kill his dog only to find out the Rueful Axe is not the Daedra artifact for that quest. It was hours after I had saved over that particular file that I found out so I couldn't do anything about it. HOWEVER, I can confirm that you can get around this during the Ill Met By Moonlight Daedra quest. In that quest you are hunting down a werewolf for the Daedra, Hircine. What you must do is when you speak to the werewolf you are hunting near the end of the quest AGREE TO HELP HIM by killing all of the hunters Hircine sends after him. Next, leave the cave and you will also receive the uncursed Hircine's ring. Now, return to the cave and kill the werewolf and use the prompt to skin him. Once this is complete Hircine will appear and give you the Saviour's hide. This allows you to get two Daedra artifacts that both count towards the achievement. Here's some additional notes that are important.

I have exactly 15 Daedric Quests Completed.
The one I have not done is Nocturnal's to get the Skeleton Key so I can't confirm or deny if it counts towards your total.
I took the Rueful Axe during Clavicus Vile's quest which has been confirmed by many others does NOT count so I definitely screwed up one of the quests.
I strongly suggest anyone else trying to get all of the artifacts look at a wiki or guide to make sure you do not screw up any of them or make sure not to save over that file. It is VERY easy to miss this only missable achievement.

Good luck!

Really? No interest whatsoever?

I would be interested if I had missed an artifact, but alas I have all 15 daedric artifacts. I am sure others though who need 15 daedric artifacts and who missed one would find this post helpful though. I have said in quite a few posts that people should always read up on the daedric quests if they want that Oblivion Walker trophy/achievement, but still every so often a post appears going 'waah, boo hoo, i missed an artifact'. People will find this post helpful if they find themselves in that predicament, so thanks for sharing.

Exact info I was looking for. Thanks Magus

I have 15 but did not get the achievment anyone know what could be wrong? I even filled the ebony sword but still 0.

I hear most often that the Skeleton Key doesn't count and obviously from my message above the Rueful Axe does not count as an artifact. Other than those two things, no idea.

Edit: Filling the Ebony sword is not required. I didn't use a single time once I got it.

ok thanks, I am on pc, pure vanilla, no cc's, took the mask not the axe. so its back to figure out why or what one I am missing. thanks for your time.

Double check which artifacts you have with http://www.uesp.net/wiki/Skyrim:Daedric

I don't know for sure but I assume you have to have them all at once. I had most of them in my house in Whiterun and as soon as I picked up the Oghma Infinium the achievement popped. So they don't have to be on your person but I assume you can't have sold any of them.

Edit: Made the list more obvious.

This is perfect, thanks.

The game cheated me out of the Oghma book by not launching the cutscene, so I can't get the achievement (and it's my last one).
Haven't done hircinde's quest yet, so yea, perfect.

Would be more interesting if anybody could post all 15 Deadric Artifacts just so we know which ones are we not supposed to miss >.< i know it's a little spoon-feeding, but knowledge like these are too important just so we dont regret missing any XP maybe you could put it in a spoiler tab? thanks!

edit: oh nevermind. i just found the list hahaha

I have a question. Ok so glad to hear about getting the achievement without the mask because I did the same thing.

Question: Ok so do you know about the quest that has you talking to the origional jarl of Whiterun about his son. Well I totally missed that and the Stormcloaks have taken over Whiterun. I know where he is (along with all the other jarls that didn't agree with ulfric) (under blue palace) so can i still do this quest?

My brother told me that you have to talk to someone else who will give you the quest idea but do any of you guys know if this remains active after Stormcloaks take Whiterun?


edit: Also it doesnt really matter for me right now (the achievement) because my Abandoned house quest is glitched. The guy just stands in the living room and doesnt go downstairs. When I killed him thinking that it would end the glitch, the quest proceeded and I talked ot the deadra. Now the door is locked and I cannot leave. Load (try again, doesnt work). Do i just have to wait for the quest patches? if they ever come or just start a new file?

I haven't started doing any of the main quest or civil war stuff but I think I did read you could still get the quest. You might try one of the wikis to see if it has an answer. If it were me I would go to whatever the local tavern where the Jarl currently is and the tavern at Whiterun (where he used to be) and continually ask about rumors and see if it pops up at either of them.

yeah thanks i just looked it up in the wiki and it said the rumor can still be had so thats good

Here's my experience:
- I think the skeleton key does not count, I did that quest early.
- The axe doesn't count, I didn't kill the dog.
- I must have screwed up volendrung, the quest giver wasn't there and i'm afraid i discovered the location without going in, so the giant must have killed her.
- I did the Hircine glitch where you get both items.

With all of that, and all the other quests completed, I finally got Oblivion Walker. I had to actually equip the ebony mail for it to trigger; just having it in my inventory wasn't enough.

wood spirit yes you can still do the quest talk to the bartender at whiterun ask about rumors take it from there. I found out I did not kill the guy [disremember his name] to get the skull so I am done this play thru for the achievment.

I think I heard Hircine's ring DOES NOT count towards the achievement.

I can 100% confirm that it does count. Read the first post, please.

Never, ever trust Clavicus Vile. Ever.