Enter The Hollow, where one of the trees is stalking you through a massive moonlit forest. It only moves when nobody is looking.

There is no normal extraction and there is no loot quota.
Your goal is simple:
The level is built around a huge forest with dirt, rocks, cabins, fallen trees distant whispers, creaking wood, and plenty of places for something to hide. The deeper you explore, the harder it becomes to tell which tree was there before and which one just moved.
One of the trees is not a tree. The Stalker only moves when nobody is looking at it. If any player is watching it, it will freeze in place. Look away and it can begin moving again.
Every note you collect makes it more aggressive.
The Stalker can:
Keep your eyes on it, but remember that somebody still has to find the notes.
You do not extract like a normal REPO level. There is no extractor, no cart, and no quota. You must search the forest and gather all 8 notes.
As more notes are found, The Hollow becomes unstable and the Stalker becomes more aggressive.
Once every note has been collected:
Find the notes. Watch the tree. Do not let it get close.