You're both right. In Spanish - and in most of the world - 1.000.000.000 is "mil miliones", Milliarde in German, milijarda in Croatian etc., but in English, that number is called "billion".
I'm clearing my pantry. I don't know if the keys are working or not (they should be), but you're free to try if you need any of these:
12 is Better Than 6
Grav Blazer
In Between
Pixel Heroes
Puzzle Together Jigsaw Super Variety Pack DLC
Plush
Project F4E
Quadrant M4
Quadrant...
There is KC: D 2 third-person mod, but you get used to it. I know I get used to it playing VTM:B 2.
And about instructions - you get the link in My Game Keys alongside the game. Here is what I got last month for Robocop: