While I'm entirely amazed you're giving games away for free, I am VERY disappointed in the way you do this.

You have a GOG Galaxy BETA which is ONLY FOR WINDOWS (OR MAC), yet you decide to use that BETA program for the giveaway?
Not only is using a beta product for such a thing a bad practice to begin with; you're also preventing Linux users from taking part in this!

You're showing your colours here, as so many companies, and I am thoroughly disappointed with you, GOG.
Very disappointed.

This is not how Mister Rogers taught you to behave.

Um, I just got my free copy of System Shock 2 this morning through the Galaxy client on my Mac.

I will agree though that the lack of Galaxy on Linux is a galling issue that GOG needs to address.

Hi i don't mean to be rude but how do you download the free copy of system shock 2 i clicked were it said to claim it and now it says the game was claimed but i never got the download is there something i have to do?

NVM it just did not show up in my GOG galaxy list but i have it.

Well, I don't have a Mac. So I didn't know there was a Mac client.
The galaxy page still only lists Windoze.

It has a link to switch the download to the OS X version right beneath the "Download" button.

Which would be Linux, in my case. Pray tell where you see such? o.o

From what I can tell the free games for collecting XP during the Summer Sale does not require the use of GalaxyClient.

The only free game that is given away by using the GalaxyClient is specifically for stress testing the use of the GalaxyClient. To me, that is definitely not an action of "preventing" anybody from receiving a free game. It's simply about participation in an activity.

In other words, if you want to participate in testing a particular piece of computer software, then you have to have access to a computer and that computer has to meet certain specs for that particular piece of computer software. For example, if the computer doesn't have a particular graphics card or certain input devices, then of course you are without the means of participating in helping out. Or, if you don't even have a computer, then same thing. To me, that is definitely not prevention.

If you don't want to install or can't install GOG Galaxy on your current OS, then you can have my code for System Shock 2. You'll have to change your privacy settings for Chat so that I can PM you the code.

See attachment.
It's strange that Windows users can download the OS X version (and, presumably, the reverse is also true?), but Linux users can currently only download the Windows version.

Remember, this is GOG's website we're talking about. Strange is what they do!

At least this explains why so many GOGnards have expressed ignorance that there exists a version of Galaxy for Mac systems -- thinking back, most of the users who were unaware are also Linux users.

You're missing the point - they're using the giveaway to increase the number of beta-testers so they can get a reliable stress test of the client. It seems perfectly logical to me.

I would argue that GOG is going about the development of Galaxy all wrong - if you're developing multi-platform, the best way to do it is develop on all platforms at once, from the beginning. Of course, I don't really care. While I am a Linux user, I have no intention of using Galaxy.

Oh, and if you're looking to get a free copy of System Shock 2, but can't/won't use Galaxy. Change your browsers user-agent string to GOGGalaxyClient/1.1.11.56, and visit embed.gog.com. I claimed it that way.
That was definitely me too. Up until yesterday, I had no idea the Mac version existed. The only link I ever saw was Windows only, so I assumed it was Windows only.

I did find it odd that the FAQ mentioned that a Linux client was coming, and no mention of a Mac client.

Well... I can see some advantages in doing it this way, namely you only have to port the code once.
Galaxy seems to be in part an exploration project. They don't have to implement the feature in 3 platforms, then change it in 3 platforms, then correct it again in 3 platforms, then remove it in all 3 platforms, then re-implement it in a different form in 3 platforms...

I don't even know what tool GOG is using to write Galaxy. Is it even cross-platform?

At some point they were hiring for Qt jobs so if they used that for Galaxy it should be cross platform.