I needed to speak to the bartender... caused a riot and was able to slide up next to him and speak. However, I picked up several other items that I never found a use for. Multiple paths?
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!