In my opinion it deserved more than a 6.5
The story well this is mainly what I got it for anyway, the story in the Halo games is something that I've always liked and have enjoyed. The one in this one is not different, it isn't as good but it's up there with the other games in the Halo universe.
The Gameplay isn't something you'd expect from a RTS, it's really simple and easy to use which isn't a bad thing at all. It being like this could make more people get interested into RTS games of all kind. With it being so simple you want get frustrated with it.
The cut scenes are just beautiful, they look great really great that's something that I really enjoyed throughout the game. Also the voice acting is another thing that's greatly done everyone just sounds great, it makes the game better.
I've played a little multiplayer at a friends house, and it makes the game even more fun, the hours just pass by before you know it.
Overall Halo Wars is a fantastic game a very good RTS, If you don't like these kind of games maybe you'll want to check it out for the story.