Towards the end (when you're back on earth) you'll face 3 banshees (effing ridiculous in my opinion, 2, why yes bring it on, 3..WTF MAN! kill) Kill one, shoot a few other mo' effers andothersand run like a mother trucker (toto the truck that is) good. Good luck its, it's a really tough battle. Perhaps more "advanced" 1st person & 3rd shooter players can rock this but that most certainly is not myself.
I hope this helps some of you guys, regardless it's what happened to work for me.