No, it's not déjà vu. The past question I made was for videogames in general. Then I realized the scope of the question was too big. So I decided to reduce it to a genre. Again, same rules: It isn't about an FPS that everybody likes. But an FPS that every single person who has made of FPS one of their favorite genres has tried. Does any game come even close to that? How close is the most played FPS of all time?