Pokemon X

Pokemon, like many Nintendo series, has never been a risk-taker. Innovation has never been a focus of the series. Game Freak has always been more concerned about adding in neat new gimmicks that take advantage of Nintendo's new technology while occasionally throwing a bone to the devoted hardcore Pokemon fans who spend days agonizing over numbers and stats. It's a wonderful formula as it draws in jaded old-timers as well as new blood. But it appears that there was a shake-up at Game Freak as Pokemon X is the first truly "new" and "different" Pokemon game since Pokemon Gold. 

Resident Evil 4 (PS2)

Let’s not sugarcoat this, Resident Evil 4 marked the beginning of the end for the Resident Evil franchise. The shift from careful item management and careful character positioning to a focus on gunplay and action set-pieces was a watershed moment in not just the history of Resident Evil, but also the history of video games. There is little doubt in my mind that Resident Evil 4’s glowing critical reception affected both future horror titles and action games in general.