On the Space Station levels, you will have nearly every type of Mil Bot (blue, red, green, black, and silvery blue) plus the Titans and the Troopers coming at you. The most destructive weapons against them all are the Barrage Cannon, Scatter Blaster, Spew, and the Rivet Gun. The Control Tether is pretty much useless, as you will not have time to hijack a Mil Bot. Show no mercy, but try to save ammunition; at the end of all the Space Station levels you will face General Corrosive.