Glitches?
Good game, but for some reason, once the aliens invade your base, they get stuck inside of the buildings, you can't attack them there, and they just wipe out your base. Also, there were some times when the other marines said "Follow me (etc.)" but didn't leave the #1 and #2 spots. The last glitch that I found was that, for some reason, the armory and turrets store locked me out and I couldn't buy anything, regardless of how much money I had... But this is still a good game :)