The best Call of Duty games give us some of the most memorable FPS experiences of all time, and honestly, it's always a good time to revisit the classics of Activision's long-running shooter series.

The late 2000s were a period where shooters blossomed, largely in part to the ongoing popularity of Halo, newcomers like Gears of War, and the rise of Activision’s cultural juggernaut, Call of Duty.

Call of Duty has taken on a lot of different shapes and forms over the last 20 years, but there are five games that have really helped define its identity. The shooter franchise has dominated the ...