The whole game (all episodes) easily deserves a 9.0!
Not only is it the best zombie game ever made, not only does it have some of the best heart-string tugging writing in the history of games, not only that but it is also a unique take on the Adventure genre.
Giving this a 7.5 just because it's short is like giving RE6 a 4.5 just because it's not what you expected...oh wait...
pseudospike's comments