The blue guys that spawn close to you and go right for you are an issue. Also, the healing should give back more than 10% if the price is going to rise every time you buy it. Raise the healing amount or stop the price increase. Lastly, who's going to buy the rapid fire when a weapon upgrade is right next to it, for the same price? Especially considering that the rapid fire dissapears at every upgrade. Decent music.
Dude. Mel Gibson? Weak.
Great games, but I must say that the references to Portal throughout only serve to indicate how badly SHIFT wants to be like Portal, and how much it fails. Still great, though. Maybe I'm just bitter now that I know that the cat is a lie.