Life’s full of epic head-to-head battles. Microsoft vs. Sony, Red Bull vs. Monster and Wile E Coyote vs. Roadrunner. Perhaps none are as fierce as the competition between Call of Duty and Battlefield. On the retail box for Battlefield 4, publishers EA actually printed quotes from IGN saying “Frostbite 3 engine and Battlefield 4 put Call of Duty: Ghosts to shame”. Boom, headshot!