Maybe this thread should be stickied and a mention of this issue placed on the 2160 page?

So uhh, someon want to share the serial code, I lost mine. <3

Nice try, but you won't get a serial key here. If you've purchased from GOG then ask them for it from your account. There should be a record in your account if you've already done so.
If you've not purchased from GOG then you aren't going to get a key from them.

Just get you're one from GOG and if you need more for you're own computers (like i do when i want to just go through builds by simultaneous testing) then visit one of the many serial websites on the net and if their ones don't work have a look at what's matching between them do a few randomizations and collate them to make you're own serials.
The biggest problem people have with serials is that they seem daunting and unpredictable, the fact of the matter is if it looks completely random if you randomly select chunks and replace variables you use that inherent value against it to you're benefit.
Or in a simplified version of Sun Tzu do not attack it's strength, gather the most intelligence you can on the enemy and attack like the snake (adaptively).
At the end of the day what have you got to lose trying? some time pfft.

So much for just contacting support for an Earth 2160 unique cdkey,
they sent me an Email with a key for the wrong game

"Hello,

Here is your cd-key for Two Worlds:
****-****-****-****

and a link to little hotfix:
http://files.gog.com/support/setup_two_worlds_multiplayer_tab.exe

Have a good gaming sessions!
Regards,
Adam

GOG.com Support"