Addon 'Hidden addon' failed to download: Steam Error: Access denied (Item hidden/banned?).
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Where is the skybox?

Are most of the doors not supposed to work, there is an area of the map only accesably by using no-clip, Because the door to it isnt an actual door but a wall, is there something i am missing?

@shardinhand Best explanation without getting technical is map files. Gmod requires you to have the original files to edit maps, map makers can use programs to encrypt that and it makes it a lot harder to get at it before updating. There is no universal program to reverse that progress, meaning unless you have someone talented to reverse the process manually you are kind of out of luck and find yourself locked out of any editing you may want to do. When the original map maker wants to update they just take their new version, encrypt it and upload that.

what does VMF mean?

Good map, super laggy.

I can't even find this map in singleplayer

what dank said

Add Ai-nodes please for npc battles