4 looks perfect to me. Very serious and bold...attention commanding. It would stand out on a store shelf. Anything similar to Zetsumei's American example gets lost in the crowd of text and faces you see in the game market. Also the name, being the only text, recieves much more attention...they're more likely to remember it if they momentarily glance at the cover while walking by. And of course the name is the name of the game. Of the game, that is.
My tastes are up to European standards, though. I'm very sensitive to cheese.
I also don't think this or any game's graphics are good enough to be prominently and nakedly displayed as cover artwork. Maybe a tank or some piece of equipment...but definitely not a character.