Most of my interactions with the Alien so far have been in the DLC. I'm pretty impressed by these overall. Playing on hard, Last Survivor is actually not all that difficult. Most of the time the Alien wasn't around, pretty much like in the movie. It was still really tense though and definitely worth pre-ordering the game for. I mean once the alarms started going off and all the smoke began blowing out, it felt so cool. I can't even imagine how much of an improvement PS4 or XB1 would be during this sequence. It'd be like playing the film. Hopefully everyone else can get their hands on it at some point.
I still haven't finished Crew Expendable, but this is definitely more of a challenge. Thinking the Alien is gone and then getting pulled into an air shaft is too sick. Nothing on the tracker, it wasn't really making any noise or at least I didn't notice. Took me like 3 or 4 times to get through the air shafts. It was pretty nerve wracking because everything is so quiet if you're moving slowly, and then suddenly you hear it speed up. I'm not playing with surround sound so I had a hard time pinpointing it, which made things even more tense. There's a lot of stuff that's not screen accurate, but I don't really care anymore. It's nice to have a mode where you can just jump into a little duel-ish scenario with the Alien. It's probably what I'll show my friends to give them a demo of the game. Having some trouble trying to get him to stay in the airlock, but playing a game of cat and mouse during this time totally prevents it from feeling boring or repetitive.