I wanted to post some of the things I've found after playing for a while.
SPOILER ALERT DON'T GO FURTHER IF YOU DON'T WANT TO GET SPOILED
Something is killing deer and leaving their bodies around my base. There's 12 so far. There's also invisible entities on the radar that I can't see with the camera or EMF detector, so it's either a bug or there's something out there that can't be seen (yet)
This door showed up outside of my base as well. The EMF detector has all 3 lights around it. I haven't been able to open or interact with it.
This object crashed outside my base and shortly after, golden orbs began spawning around the map. If they get close to you they will kill you. Not sure how to defeat them.