Hi everyone! Exciting news today. We've just launched HelloMods in a partnership with ModDB.com. It's a modding competition with real cash prizes for modding Hello Neighbor!
http://HelloMODS.com - official website with details
In short, we kinda released the source code for Beta 3, and packaged it so you can add plugins to the main game, modifying to your will. You can build a new house, import new objects, animations, etc. It's a full on modkit officially supported by Unreal Engine.
I can't wait to see the mods you folks come up with. How creepy would it be to run from a Neighbor clown through a sewer?