A bit over rated.
There are some bugs here and there in the game, but nothing too major that I ran into.
If they would have continued the game in more of the way where you had lots of choices of how to attack each situation it would have been better, being forced into a linear path on how to do and attack things is boring and is what the 2nd half of the game is like. Aliens were kind of annoying as well flying from all over the place in the air attacking, you had almost no where to take cover from them, just shoot and be shot.
9.5 is a bit too high, its a good game though, but not that good.