Thread:Cosmicsilver/@comment-24886111-20141201101311/@comment-24886111-20141202031933

No, never had the cursed sword, just the Greatsword of Artorias and Greatshield of Artorias. On the Knight's Honor page, a user named Jimeee said he had both swords and no shield, and the achievement popped. I'm guessing you only need two of the three items for the trophy.