As far as I'm concerned, GGOAT.
Killer 7 and Resident Evil 4 were being developed by Capcom around the same time. And half a decade later, many gamers can clearly see who won the popular favor. Let's face it, RE4 had everything going for it: solid gameplay, an unforgettable story, and great voice acting to name a few. What if I told you, though, that Killer 7 has these exact same things and more? Players enter the role of seven assassins that seemed to have come together to take down a vicious cult of abominations known as the Heaven Smile. That's the proper storyline, but during the game, other contracts are assigned and personal scores get settled. Please trust me when I say that these missions are just as exciting since it exposes the more vibrant characters for what they really are. I won't be giving a detailed summary of what happnes, though. But, if it's a SPOILER ALERT you're after, combine the films "Fight Club" and "Resevoir Dogs" and you'll have the right mindset entering in. Game controls are minimal since third-person exploration meets first-person shooter action. Some may complain that this facet of the game is too streamlined, but players who get hooked into the bloody saga will probably be glad that controls have been sacrificed in the name of storytelling. After all, you don't want to worry about complex button schemes while trying to figure out what's going on after a strange cutscene. The cel-shaded graphics are a nice artistic touch with an anime flair. Players should expect nothing less, seeing as how Suda51 spearheaded the project. Combine the visuals with the meticulously well-done voice acting, and Killer 7 transcends being a video game and becomes its own unique experience. If Killer 7 weren't coded and set to consoles, it would be a cult movie. If a studio didn't want it as a movie, it would be a best-selling novel. Everything about it has stuck with me now for some time. And that's why I nominate Killer 7 for the Greatest Game of All Time.
A dark and unique shooter
I first got this game because it seemed to stand out in a magazine of Nintendo Power. The story isn't the easiest to follow but it is executed with little fault. The game play is rather simple yet unique, technically it's "on rails" because you are limited to certain directions to explore in levels. Yet you still control where you go in the contained space. As you can tell by the cover, you can be any one of these assassins and they come with their own style. It's a lengthy game as well, and it will always have a spot in my most favorite games of all time. It's gritty, dark, unique, funny, shocking, sad, and joyous kind of game. It puts first person shooters, adventure games, and twisted sense of humor in a blender and slams on the puree switch. The result is a fantastic piece of art that you won't want to miss.