The serial number was not found in the database. Most likely the serial number has been entered incorrectly.
But.. but how? I got the free code from buying a GTX 570. I just went to geforce.com/freebatman to have them resend me the code because I lost it (the steam code, I still have the code you use to unlock the steam code)
I copy and paste the code them send me... and I get activation failed.
Did you try clicking on "cd Key" on the right side of steam for arkham city? My first activation failed because i used th code provided at the bottom of the activation box which didnt work. I used the code from clicking on cd key in steam and that worked.
Thanks toddx77! That was the problem haha I feel so stupid. I don't usually buy games off of Steam, the only reason I got this was because I bought a new graphics card and it came with a code for this game. Thanks again