This is a quote from gamespot "I spent about nine hours playing Ground Zeroes, and my completion rating was only 30 percent. " so don not worry about length of the game if you like getting everything there is in the game.
First of this guy should not be aloud to review a game ever again. In no review ever have I seen someone rate a game so badly for having a high price-tag. This so called reviewer forgot about everything else in the game like the mechanics, gameplay, and story. I know he said they was great which should have raised it score. I understand if you was taking a star of the final score because of the length but you don't just give it the lowest score possible because of one aspect of the game. ...
So konami only get $13.333 per game. That can't be right even if it was ground zero sold 2 million which would of payed for a chunk of that budget even with a reduced price.