Whos got this? i have, and im stuck on level three, and once im inside the ship, gone into that massive room with two levels with loads of aliens, i kill them all, but then what? u can walk around and shot random stuff for hours and there's just nowhere to go!

U enter the ship, and find that door which u cant open, all ur marines stand there and u hunt the switch to open it, u find a big room, let them in, have a massive brawl and then what?

I just seen to go round and round and ...