Oscar-winning music man Trent Reznor penned the theme song to the new installment of the wildly successful video-game series Call of Duty, he tells USA Today. “I have been wildly enthused about gaming since I was younger,†explained Reznor, “and a career path I chose not to go down but did really consider was getting into programming and game design.†In fact, you might have dispatched Reznor with a Call of Duty head shot without even knowing it: “As a player, I’ve generally focused on multiplayer.â€