Quote Originally Posted by GLaDOS View Post
I have a 20 digit code. I tried adding the code I got from that site but all I get are errors sadly.
Where did you pre-order your game? If it doesn't work you might want to ask for a replacement code.

Aside of that, when entering the code, make sure there are no empty-spaces infront or behind the 4 digit combinations. Also make sure you're really pressing the "add early-acces code/pre-order code" button under my account, and not one of the other where you can add codes.