Hello. I went into my libray to check for updates and other similar things.
I read this message at the bottom of the page related to TW3: I clicked "REDEEM NOW" and registered to Dark Horse Digital website. However the site is asking me for the CODE.

Where I can find the code?

Thank you.

Also I didn't get "Neverwinter Nights" game too as promised for preorders.

It sould all be in the email you got after you preordered the game at GOG.

Hmm, I didn't even noticed that, But this is how i see it. Type witcher on the search box. There will be 16 result, one of which says "Witcher Sampler". So more likely, there needn't be a code. After going through the sampler, you can decide to buy from the other 15.

You'll need to check your order confirmation email for the dark horse comics code, [#comicCode] is where your code should be listed but it seems there's a website bug or something as the real code is not shown there (it's not for me either).

Your Neverwinter Nights redemption link should be on your order confirmation email too.

You can look up your order number here: https://www.gog.com/account/settings/orders (e.g. order #aa99a1111111)

Then search your email for the subject "Your order #aa99a1111111 is complete!" (replacing #aa99a1111111 with your real order number).

Thank you. I'll check the email when I go back to home in next hours.

I've checked my email, there are no codes for NWN and the comic book.

If they are definitely not on your order confirmation email (theres no code written in the email for NWN, just a redemption link - there should be a code for the comic at the bottom), then you'll need to contact GOG support.

You can do so here: http://www.gog.com/support/contact/my_orders_and_payments