Black Ops Zombies on iOS has just received a significant update the adds Call of the Dead: Director's Cut to the surprisingly good mobile FPS. As the iTunes page explains: "The original zombie killing team of Nikolai, Takeo, Richtofen, and Dempsey are back to fight a new and ruthless zombie menace in the dark and ice-covered isles of Siberia."The update also comes with new weapons; the V-R11 and the Semtex mine, new achievements and a new Perk-a-cola; Deadshot Daquiri. Activision says "a variety of optimizations and fixes" have also been added.