Part of that comes down to the implementation of at least somewhat more complicated objectives and the inclusion of your battle squad in combat. The storming of Normandy in this game felt like living through the opening scene of Saving Private Ryan when it was first released - and while the graphics aren't as cutting edge as they once were, the sense of how well you're situated in a particular time and place is still very well done here. Whereas preceding shooters largely focused their attention on fast and kinetic action alone, Call of Duty drew its inspiration from some of the biggest films of all time.
It does so with the help of countless influences. What's truly exceptional is how Call of Duty manages - despite its aged and anachronistic graphics - to create a real and thrilling sense of place. Call of Duty has been one of the biggest flagship game franchises for years now, but you might find yourself surprised by how much the original incarnation of the first person shooter franchise holds up.