This is a very, very difficult game. The enemy AI is very strict and they are everywhere. Sorry for the intense saving and reloading but I had to do some sections without raising the alarm and from starting over and over again. You are as good as dead if you are caught in this game.
Alright! It was tough as I had a hunter alien on my heels the whole time, but I was able to reach Nicole, who was attached to the Marker. I defeated her (eventually) and made my escape with Ellie. What a cool game. Final boss and game ending! Great stream!
I am near to the end of the game (I think). The air support is under heavy attack via enemy outpost air defences. I used my cloak extensively to sneak up on my opponents. Disabling three of the guard towers allowed Psycho to destroy them for good.
