Here is my wooden watch tower design. I modeled and textured this tower in Blender 08.12.2010. https://3dhaupt.com/wooden-watch-tower/
Test in Unreal 4 https://goo.gl/BHMNPW
Test in Unity https://goo.gl/6WlImI
Test in Blender Game Engine https://goo.gl/JULQnp
BLEND (Blender, filesize: 6.26 MB), OBJ (OBJ, filesize: 469 KB), FBX (Autodesk FBX, filesize: 618 KB), GLTF (glTF, filesize: 18.2 MB), DXF (DXF, filesize: 647 KB), DAE (Collada, filesize: 626 KB), 3DS (3D Studio, filesize: 197 KB), UNITYPACKAGE (Unity 3D, filesize: 2.7 MB)