Perhaps because the protagonist is rarely shown onscreen in such games developers have had to compensate in other areas, but whatever the reason FPS games have certainly inspired some of the best music in the industry over the past decade. Especially powerful are the main title themes that often have mere minutes to define the game's world, its heroes and villains, or the overriding emotions of the story. Ask any gamer to hum the theme from Halo, and you'll realize just how memorable these themes can be.
But imagine for a moment a world without Halo – what FPS themes would rise to the top? Here are IGN's picks for some of the very best.