Left 4 Dead 2:  This is an unusual prospect for Valve - a full sequel, actually featuring more content than its predecessor did at release, being put out only a year later.  Given that the Half-Life 2 episodes were supposed to be a quick way to continue the story yet we're still waiting for so much as a teaser trailer for the third one five years later, it definitely seems kind of weird.  Still, ...

Call of Duty: Modern Warfare 2:  Or just Modern Warfare 2, as Infinity Ward clearly wanted to call it from the fact that the words "Call of Duty" don't appear anywhere in the game or on packaging for special editions. MW2 is the follow-up to the last game the series' actual creators made two years ago, and picks up five years later. The fate of a few characters is left up in there, but main protagonist ...