Cool, Zoey!
Her not being slutty alone gets you individuality points. The drawing is great, but the perspective on the street looks a bit off. Of course there is a hunter in the back. Don't worry, Zoey, he'll attack Louis or Ellis like he always does.... Nothing bad ever happens to Zoey, Rochelle, Bill, or Nick. (At least not as much) I drew Zoey not so long ago and posted her in my Art. (Take a look! Not nearly as good) Man I love L4D! WOO!! .... Anyway, the left shoulder looks a little flat, and as I mentioned before, the perspective on the street is also strange.. I think it's too high. Yes, that's it. If you could maybe squish down the background (everything behind Zoey and the wall), then this would be perfect. Oh, also, Zoey always has a smudge on her cheek in the game. (for some reason) That, however doesn't matter at all. Beautiful depth! Great color!
You've caught the mood of the game which is: "Okay, so there's the saferoom! Louis is black - and - white, Bill's out of meds, and Francis, who was played by a five-year-old, died in the beginning. All we have to do is fight our way through 200 more zombies, a Hunter, a Smoker, and - for some reason - a Charger, then we can rest in the saferoom!"
Well done!