He looks amazing!

i think you should draw his body (maybe without his legs) and add some clothing and maybe some gear so it can be placed in a more specific genre but it could be your intention to let the public imagine the world where he lives in for themselves. I think he lives in some kind of postapocalyptic version of our world though. don't know why but i keep imagining that. Still very nicely done, i like the details and the roughness of it!

This is really good, but I have this odd feeling a little more could have been done with this piece... it just seems so... incomplete... like a sketch that started being improved upon but was left after almost done... it certainly seems alot like it was a modified sketch with plenty of red shading,,,

Really nice art! I must say, I'm a big fan of MGS.