Steam codes

You can now get Steam codes if you got the game through a bundle or Fastspring, and Gamer's Gate soon.

Instructions are here. Since I don't got many of these bundles myself, I kind of lack good instructions how to redeem the Steam codes. Please help me out if you know a better way to put it than I did.

Steam code redeeming process:
Once you get a Steam code, open your Steam game library. On the bottom-left there will a button with a plus that says "Add a Game...", paste in your code once it asks for it. After the verification process where it says which game your going to get, the game is yours!

Oh, no, I'm after instructions how to get the codes in the first place if you purchased the game through a bundle. Sometimes you have to go through Desura.

If you purchased through a bundle, desura will tell you to check your bundle account (indiegala.com)
Knytt Underground was in: THE SPRING SUN BUNDLE