It leads right to blackwater base and I'm tired of running up and down this mountain!
![Crying or Very Sad :cry:](./images/smilies/icon_cry.gif)
No, I think that you don't have the valid version published by Oskar.
That is a good point. If you can open that door, in any way, you are not playing the main version of AT. There are AT clones out there (the price of an open source game), but I have yet to see one that adds something beneficial.