Pretty impressive if you ask me. Its from Urban Mammoth's Urban War game (set in the Void Universe). Also, check this other unpainted guy out...
I think that combining Roman imagery with giant robots is pretty silly, probably no worse than 40K's dreadnoughts covered in medieval religious objects I suppose. Still, the model has a certain appeal none the less.
The game designers themselves know these values are not realistic and they do not intend them to replace or invalidate the fluff. So let's get on with our lives and not fixate over the cosmic ramifications of game mechanics which we already know are streamlined for larger forces at the expense of detail.