Another year, another Call of Duty. Another year, another finely tuned but overly linear–and now very short–campaign. Another year, another iteration of the same bloated multiplayer suite with a new character advancement system. Another year, and another season of blockbuster holiday sales for Activision and Infinity Ward. Aim down the sight, fire. Guy gets behind cover, grenade. Duck, pop back up, fire, hope you hit something, move on.