Hello Matthew,
I have several years of experience as a professional writer and editor. I currently work for a US based publishing company specialising in fiction and poetry. As a writer, I've sold three novels for publication and have about 100 credited publications online and in print. I would absolutely love to write the story for your zombie game.
I've loved video games my whole life, and though I can't do the programming, I can write. I've wanted to write for video games basically since I first learned how to write, and I'd love the opportunity to work with you on this. RPGs have always been my favorite games and they're the ones that influenced me to write fiction. It would truly be a dream to write one.
The bid I made is, I guess, sort of just a number to throw out there. I understand how the payment's to work. I mostly just want to let you know how interested in this I am. I don't know if you have a story in mind, but I can help you refine it or help you create it, depending on where you're at in the development stage.
But, yeah, seriously, I can't tell you enough how much I'd love to do this. I can provide samples of my writing for you and anything like that.
I look forward to hearing from you.
Thank you,
--eddy