So we had a bunch of things that got cut at various points through the game. This is a good listing of them:
1) "Horror Director": This system was originally designed to handle our jumpscares, horror sounds, etc. But it became a bug factory and needed to be totally cut at the 11th Hour, which eliminated a large chunk of the experience. This makes me sad, because we have a whole soundboard of Larry screaming and being upset at things...
2) Retooled Opening and Closing scenes. The outdoor scene suffers from receiving basically no developer attention, we spent literally 2% of our dev hours on it.  I had hoped to come back and retool it but the rest of the game required attention. The opening Helicopter runs on a spline I was using to rough the scene out, I had intended to go back and do it as a full Animatic, but alas.
3) Level Streaming. Currently, the interior level is a performance nightmare. I was intending on breaking it up into smaller, streamable levels, but we just ran out of time.
4) There's actually a good chunk of the ship that we cut early on, including additional quarters, the bridge, and another outside segment. If we had time/a budget I'd return and retool the golden path. As is, the experience is pretty short because the retraversal is fairly limited.
5) PUZZLES! We had to ditch almost all of our puzzle mechanics because we couldn't guarantee they were totally solvable without Developer help.