For me it was Metal Gear Solid 3 and 4, as well as Devil May Cry 3.
I used to have a pretty hard time thinking about what were my favorite games and the ones that changed my tastes and probably perspectives.
I realized that every time get asked this question the first games that come to mind are always these 3.
This sounds like the stupidest idea I’ve ever heard (so far, who knows what else will they think of).