I recently installed this game and I came here to check how to make it work on Windows 11, since it would close the game the moment I would launch the game, I boot up the game, enter the CD key, create a character and the game works fine.
I saw that there was a link to the 1.3 patch here and installing it makes the game show the CD key screen again when I boot it up, but every time I try to use the CD key from steam, it tells me its an invalid CD key.