I am working on making the wall as a survival game. (Including scaling the north side of the wall, the top of the wall and castle black) Using call of duty zombies as the engine. Please can I use this model, it's for a non-profit project. I will provide full credits to you and link this page on the description of the map download if you did allow me to use this model.
p.s. the whole dev process is on my channel if you wish to see it in action.