Thanks Geezy. So I managed to recover my order email, but neither the "1-PA-30-BasePack" nor the "Prison Architect (Steam)" keys are working on the registration page . Any ideas? I guess I'm contacting support. edit: Maybe I registered it to an other email originally and complete...

So uh, my version of the game doesn't have a "CD Key" link in Steam (maybe it's moved since those screenshots), and I've long-since deleted the email with the key when I first bought the game.

Any ideas how I can get my key to access the developer forum?