Here is my residential building set with different numbers of floors. 3D-modeled and textured in Blender from 17.03.2012 to 18.03.2012.
http://wp.me/P3dmoi-1lo
Test in Unity https://www.youtube.com/watch?v=JkTJqT_xbr8
Test in Unreal https://www.youtube.com/watch?v=_35rhmHL3AE
Test in Blender Game Engine https://www.youtube.com/watch?v=bjQ3booklx4
BLEND (Blender, filesize: 19.6 MB), BLEND (Blender, filesize: 19.6 MB), OBJ (OBJ, filesize: 30.8 MB), FBX (Autodesk FBX, filesize: 15.4 MB), UNITYPACKAGE (Unity 3D, filesize: 36.7 MB), UASSET (UnrealEngine, filesize: 57.7 MB), 3DS (3D Studio, filesize: 15.4 MB), ABC (Alembic, filesize: 15.4 MB), DAE (Collada, filesize: 15.4 MB), DXF (DXF, filesize: 15.4 MB), MS3D (MilkShape 3D , filesize: 15.4 MB), STL (Stereolithography, filesize: 15.4 MB)