Always liked this guy, was my favorite robot to play with back in the 80s...yes I am old.
It is unrigged mostly due to complexity with the tubes and hydraulics. I also sell in multiple formats and not sure if other programs would interpret things the way it would be intended. While the tubes are meshes, I did include the curves that they derive from.
Verts - 43,242
Textures - 1x4K set + minor nodes for the emissions and tube curves.
OBJ, STL, FBX and Blend files.