Soo...No More Heroes, it's pretty good.
How can a game be good without a hero? Answer me THAT moody sleepy guy!
Much in the same way that many movies have no "hero", in the literal sense of the word, but rather simply a main character. The so-called anti-hero, who, engaging in actions that a "true" hero would not be a part of, acts as the audience's gateway to a world of shades of grey rather than black and white. This main character is not above killing or acting in such a way as to bypass laws and recognizable social mores in his quest.
No More Heroes presents us with a main character who is a killer, though to put it more precisely, a killer of killers. In your quest, the main character kills hundreds of hired goons as well as other assassins. A hero, in the sense of the word that is commonly used, would find some way to arrest these people and would likely attempt to work through proper police and judicial channels to maneuver past these "obstacles". The anti-hero feels no such obligations and takes more direct action. In other words, No More Heroes.
That wasn't very funny...
You're the one that asked.
Wait, did you actually take my question seriously? How do you do that? Have you actually ever met anyone who doesn't understand the difference between protagonist and "good guy"? Really?
I chose to take you seriously, if that's what you mean.
This game does look pretty good.