The game doesn't interest me so I'm not gonna try but to the ninja's out there, I'm thinking you might want to pay attention to the file extension a.k.a. file type (at least that's what I would presume). +1 to Kristian tho.

We really need a hint.

Hint: begin 644 hint.txt
>:'1T<#HO+W!A<W1E8FEN+F-O;2]C36XP:DY!:PT*
`
end

Quit sure you don't get it still?
Unsure I can help any more.
If I give another hint, I am afraid that will only give the whole thing away.
Can you have some patience, then you may solve it.
Karen Blixen is not in that picture.

Sill in doubt?
Then maybe look beneath it all
Else you may not get the game.
Grab it while you can.
Or lose the option.

Gift redeemed, thank you.

That wasn't so hard, was it?

Nope. :D

HAHAHA good one. To be fair I can't exactly remember all the steps I took on that one in detail. But it went something like this, I took the GOG code converted it to binary, converted THAT to binary UUEncoded the output of that, UUEncoded the the pastebin link to that, put a link to it on pastebin, put the pastebin link in the image using Quick Stego, uploaded that to a file hosting site and put a link to the file on pastebin.

You should write a tool to automate that, repeat it 50 times, and then see if anyone is patient or desperate enough to do it that many times in order to get the code.

And for what it's worth, I solved the puzzle a few minutes before triock did, but didn't redeem it (combat-RTS isn't really my genre). Hope you enjoy the game, 'cause I know I wouldn't. ;>

Yes, I did all that in reverse order. :D
Well, I had some problem with software installation. ;)

Didn't redeem but, +1 guys :)

Also, here are a couple codes for some iOS App Store games I don't want. Don't think they're valuable -- they only cost $1 each, and there's a reason why.

4HJWY47LKP9L - Skate It

A3N7TR6KHAHM - Battlefield Bad Company 2