http://www.youtube.com/watch?v=EOzPITA9TPY
So you can guess where this idea for this map came from(wanting to do a map for Halloween).
But ran out of ideas and lost interest in the project
Here is what was done.
(on a side note, have you ever tried to make a scare/spooky/horror/spoopky map for portal 2?)

Hmm, I would have liked to see this finished.

Yes, I have made a scary map called "killer's office", but it has a tendency to randomly crash on other people's computers apparently, and is on my workshop but not here. Yours though.... That's is some seriously creepy material. That moaning adds quite a bit. I'm working on 2 other projects on the side, Timmy and Paranoia, and have one canceled creepy map, enderchell.

If you are considering releasing or working on that map though, I would play it.

Yeah I'm working on a surreal horror map that was originally planned for Halloween. But given that a) I wasn't satisfied with the amount of weirdness currently in it and b) I didn't see much other Halloween-related activity this year, I decided to finish it properly and release it later.

That video is pretty good. Looks like a very good exploration / survival horror themed map.

Same thing here. I planned to release Hide on the 31st, but I ended up running into some bugs, and later decided to add another entire section to the map. Might make a <Holiday Name Here> map though!