If you owned the physical CD-ROM version of the Ultimate Collection, the serial number was printed on a card inside the jewel case. However, the game also required the disc to be in the drive—until a patch removed that requirement. The exclusive serial number became the sole proof of ownership.
For additional technical troubleshooting or if your key is missing from your account, you can contact GOG Support directly. settlers 3 ultimate collection serial number exclusive
Set s3.exe to run in Windows XP (Service Pack 3) compatibility mode. If you owned the physical CD-ROM version of
If you purchased the game through GOG.com, follow these steps to find your unique multiplayer key: settlers 3 ultimate collection serial number exclusive
Why go through all this trouble? The serial number unlocks more than just the game.