omg, i already voted, but i mistaked the WH40K Space Marine for the Halo space marine D: the Space Marine wouldn't be to hard to make, but its going to be BIG, lol. you WOULD have to use stilts, and do some modifications for the hands so that you can curl your fingers..... lol...... if there was a vote, the WH40K Space Marine costume at full size would by far be the hardest to wear