Originally Posted by Blade
If you took part in the promotion to get the game on Steam, you will need to register and contact the Running With Scissors team and request your key. Here are the instructions: http://steamcommunity.com/workshop/f...0398919161255/
They cross-check your information, so don't bother trying if you didn't contribute to getting the game on Steam. I don't seem to have the game on Desura, so here you go.
EDIT: I found my Postal 2 Complete code for Desura. It was in Groupees Be Mine 3, and I hadn't activated it. Go to your Groupees accounts and copy/paste your code here
, follow Fox's instructions, then redeem your CD key on Steam.
I forgot to mention that you can request a Desura key for Postal 1 in your e-mail and get both.