This walkthough saved me many hours of raging at my xbox 360. I found the one thing I was missing was the: strong attack with the Magician sword even though i know I did that in a previous playthrough. Finally Achievement Unlocked: Head Trauma. Also I think it helped that I had a save in the 2nd slot close to the beginning after doing every single melee weapon in the Safehouse and Royal Flush Plaza.
Also I did the normal attack, strong attack, as well as throwing the object at the zombie hordes.