Turtle Boy:
I like what you've done, but had I not read that the signature has to be CS:S, I wouldn't think that it is. It looks like a Die Hard movie and John McClane had just finished off a whole lot of fucknuts. I am assuming this because of the whole fire-y theme ya got going there. It wouldn't of hurt adding some kind of subtle gesture to it being CS:S.
Killerstunter:
I really like what you've done, especially the ghost-y after-part of the main character. The only thing I find wrong with is the lack of contrasted colors, the colors seem really bland and dull.
My vote goes to
Killerstunter for showing it was CS:S better than TB.