Even though the Call of Duty series thrives with its multiplayer modes, the games wouldn't be the same without its cinematic, rollercoaster-like single-player campaign modes. From its early days, when the games were set during the Second World War, showing off epic set pieces like the Storming of Stalingrad in the first Call of Duty or the now-iconic All Ghillied Up mission when the series shifted to the modern day with Call of Duty 4: Modern Warfare.