Shout to 
Yeah had same problem. You need to take that attached territory on start where you got iron and start pumping out laser beamed weapons so that you could have when they come in.
But I was a tad bit disappointed at how easy the actual game is. No effort what so ever. Well barely any. Maybe I'm just a veteran player and know what to expect. But I got my ass kicked in Crysis and hence I just think the game is a bit too easy on the ends. :)
