I'm not assuming anything. I'm merely asking a few questions. Anyway, thanks for taking the time to respond - even though it's mostly conjecture.

We have the problem that one of our friends cant join mp game. In Steam discussion you can see that we are not the only one with this problem. Anyone has a fix or Ports which should be open

That's not true because other devs have a fully-functional multiplayer mode, albeit sometimes with a serial or some other way of identifying customers. As I wrote to GOG, we can all be grown-ups and admit that's the opposite of "fully optional client app" as advertised, or deny until expection becomes rule as other policies.

I'm not complaining, I don't even like multiplayer, I'm just pointing out something plainly obvious. To be more constructive, here goes something worth complaining: people that do like multiplayer are currently unable to cross play with Steam, which would probably not happen if the multiplayer activation was global and embedded in the game.
Yeah, all hail choice. Devs choose not to embed a multiplayer structure into the game (independent of each store client app), people choose to cross play, oh wait, they can't, that's not working. ;)

Um, you clearly missed my point.

Of course some do, and they are designed like that regardless if they are on Steam or some other storefront. Essentially they build there own ways to handle matchmaking and all of that, which was much more common on older games before Steam compared to today.

As I said they're not going to build a way to handle that traffic just for GOG when they use steamworks and are coming from Steam to GOG which handles all of that for them and all they have to do is include it. Therefor it was logical for GOG to offer a way to do that like Steam does so they don't get left with gimped version of a game compared to the game on Steam.

Perhaps you should take a look at what the steamworks api does: https://partner.steamgames.com/documentation/api

Without it, devs either build there own ways to handle it in game or use another service to accomplish the same thing. Rarely do devs build there own anymore though. It's far easier to just use the steamworks api, which obviously GOG can't really use. So they of course built their own api with Galaxy. It's a lot of extra coding that can be completely avoided during development.

Not specifically talking about Grand Ages: Medieval... but in general, a lot of new games today utilize steamworks for online multiplayer.

Sure sounds like complaining. ..

Yet again, another game that has a Linux version on Steam but not on GOG. Can anyone from the GOG team give a reason for this? I've asked the same question regarding Dungeons 2 (another Kalypso title) and there was no reply to that.

Metro 2033 Redux
Metro Last Light Redux
Grand Ages Medieval
Dungeons 2

These 4 games have one thing in common, they all came on GOG without their Mac/Linux versions and the lack of a proper reason why.

Hi!
Sorry to bother you but i didn't get my Camelot DLC and the other (bonuses for pre-order)...
I play offline.
Any help is welcome.

Btw,how to disable online mode,i'm tired to see the message "an error occured blah blah blah".

That message is a bug I believe that should be fixed on Monday...

http://www.gog.com/forum/general/release_grand_ages_medieval_6f7eb/post3

Tropico 4 is missing Mac version too -> also Kalypso. I wonder though what happened to the linux version.

The bonus DLC I would assume is under your GOG account were the standalone installer is? Not sure about that one...

After a refresh of my account ,it's fine ^^
Or some Pixie do the trick XD

I bought the game in prepurchase and it's not available in the library. That's so mean :(

Refresh your account here: https://www.gog.com/account/refresh

Damn Ninjad again :)