Scavengers:Something was Eating us. Therefore we should continue starting waves and bringing these monsters upon us. 'Cause how boring would it be if we didn't?
There are a few problems such as a sometimes irregular crossbow fire rate- not just at the back crossbow, which has many problems, but also with the front crossbow. Also the game is incredibly repetitive, to the point where it gets quite boring after the second boss. The mechanics are interesting, and it has potential, but its just not there yet. 3/5
Grinding Tip: At a boss (works best with third) destroy the boss so you get the cash crates then allow yourself and your base to be destroyed. You keep the cash and get to play the wave again to get even more cash. Be careful with your buildings turrets and repair rate though, they might mess with ya a bit. Keep this comment Alive so other people can see it!
To complete last Mission, just use nothing but tanks until you have put out at least 3, and use all support as needed. That got me a pretty easy win, should work for you as well.