I successfully completed an ASUS Promotion with my Crosshair VI Hero Motherboard, and received the email with my supposed Steam key for Prey yesterday. However, Steam does not recognize the game key and tells me it is invalid. The included pre-order code seems to be valid but can't be activated without owning the game of course.
Hi, I have exactly the same problem. The code is not accepted although I tried with copy & paste, manual typing and replacing critical letters (O vs. 0. I vs L etc.). I replied to the generic info mail, but so far no response.