This will not allow me to get the other achievement Oblivion Walker.
I won't be getting that either but in my case it's because for me, the Waking Nightmare quest is bugged, with Erandur appearing in an inaccessible part of the dungeon when we walk through the first door.
When I first started playing, I liked this game. Now, not so much. Playing on a PS3 is bad enough with all the freezes, crashes, corrupted saves and all the other nastiness PS3 users are experiencing. Factor in the, in my view, really craptastic character design which I was unaware of not playing previous titles and yeah, my enthusiasm is fading fast.
I had no clue going in that you couldn't play a class-based character and if you wished to continue to level up, you eventually had to completely switch over. I thought I'd play a light armour, one-handed weapon type using destruction and conjuration magic. Nope. Can't gain any more XP that way. Now I have to switch to heavy armour and two-handed weapons or blocking with a shield while using the other schools of magic.
My sessions now... find some baddies, shield in one hand, healing in the other, block, block, let 'em hit me a few times, heal, repeat. And one hour of gaming is actually 15 minutes of gaming and 45 of freezing, rebooting, re-playing things I just did because the saves corrupted.
J.E. Sawyer of Obsidian recently commented on the issues with larger save files that New Vegas and Skyrim had on PS3, with the console having a split memory. If developers can't come up with a fix for that or Sony can't make a system that run those types of games better... well, I wish I'd never switched over from PC gaming.