1. Call of Duty (2003) The franchise's first game was developed by Infinity Ward and published in 2003. This is the first of many entries in the series focused on World War II, following the steps of other household names like Medal of Honor.

Call of Duty 4: Modern Warfare and its sequel Modern Warfare 2 are not only some of the best Call of Duty games ever, but also some of the best and most important games of all time. While Modern Warfare set the gold standard for what these first-person shooters could be, Modern Warfare pushed it to an even higher peak.

Can you play Warzone 2 without Modern Warfare 2. As confirmed when Modern Warfare 2 was originally announced, Warzone 2.0 is "the new, free-to-play battle royale Warzone," so although it's built on the same technology that's powering MW2 you won't need to purchase that full-price release to get access to it.