I've just been stung by the "invalid serial number" problem as my son gave me a second-hand copy of GC2 DL for Christmas. We are now in contact with the seller to try to get their Stardock account.
However, I'm wondering if I can resolve this another way. I'm interested in getting the Dark Avatar expansion, so my question is: if I buy and install the expansion, will it allow me to patch up the entire game, even if the original serial number is reused?
Note, I'm not trying to do anything underhand here. The copy I have is genuine (though I am aware that the seller could continue to use the game without the CDs). It is just that I would rather not have to make a return because of the unusual copy protection Stardock uses.
(BTW, I understand the logic of the use of SN, and like that the CDs are not needed for play. But the resell of computer games is so popular these days, I think you need to write the no-transfer clause in 36pt at the top of the EULA.)
Regards