This is a mod, meant to be abit creepy, but a whole lot 'o' hard! Not impossible, mind you, but hard, non-the-less. This mod gives you a full campaign replacement, however, it does not have different level names, or music. The demo including the first 5 levels should be out shortly.
Yes, it is finally out. Download it Now! Read the for more details!
Good maps, how do you make doors? I do not do them, I could help, take a look at these maps, the link is on the other comment.
Moddb.com Enjoy¡¡¡¡