Just bought this and used the supposed code on the back of the manual and it says invalid. On the steam support it says your code will be 13, 20 or 25 characters long but mine is 15 in a XXXXX-XXXXX-XXXXX format. Anyone know what's wrong? I've tried swapping V's for U's, 6's for G's, even D's for 0's and O's. I can't call sega support because it seems they are closed over weekends. Is it meant to be 15 characters? Where were your codes?