This 3d model of my mecha robot was created at first for 3d printing with blender3d software.Then I realized if I remove subsurface modifier,it could be useful as lowpoly mecha robot character.Images rendered with cycles rendering engine and rendering settings like on preview images are the same in BLEND file.

I am not that good with creating hands so use BLEND file and customize it to your needs.

OBJ file has both lowpoly and 3d printable file,but you can export it with more subdivisions in STL and OBJ from blender3d software.