I activated the serum and cleaned the air from poison... now I saved one last sister on the level Neptune. At the moment, I am lost. No further hints are available or direction. Will have to explore this in my own time away from streaming until I encounter what else to do.
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.
