Hey,

If I get this - Will it make sure that the game I get are at least in the platform that I use? AKA Dat Linux, tho.

I don't think so to be honest..
You may still get lucky though : )

Nope. But it does give some preference with what is on your wishlist. See this for a list of games being offered.

Well, it is only $3. And you could buy it as a gift code. And you could always try to trade it with another user here on GOG (I got Rogue Legacy, which is Linux-approved, as a gift code specifically so I could trade it if I decide I find a better offer). And you could also contact support if you get something non-Linux.

Just some thoughts...

I came here to ask this too. Will bump for definitive answer.

I can probably make most anything work, but I wouldn't mind if I could weight it for something I can use out of the box.

No, I wouldn't count on that.

Normally though it does sniff your user-agent and warns you if you're about to purchase something that's not compatible with your OS.

Yes, that's true... good point. :)

I don't think it gives a toss what's on anyone's wishlist. =) It does prioritize games you don't own, but some titles seem to have limited quantities that are periodically replenished (just like in the Indie Piñata sale earlier this year), so even if not all the games in the Mystery Games pool are owned, you still might get something you don't want.

Well,

They helped me out a few times. They took back the Windows game I got and gave a store credit which I used but kept on getting Windows stuff.

How does one trade games in their account - Someone mentioned it here.

You can only trade/give away games you bought as a gift. And it is done by simply sending the gift code to whoever you want to give it to via the means you prefer - email, PM/chat, written down as a rebus on a piece of paper and mailed via the postal system, verbally, carved into the skull of a common enemy, or through any other interesting way - (already-redeemed codes can, of course, not be redeemed again). There is no "trading" function built into GOG.

If the game's in your account, you have to ask GOG Support to convert it to a gift code, provided that you haven't downloaded it or its extras already.

If it's already in the form of a gift code, then you can sue the GOG Trading Thread, saying what you have on offer and what you'd like in return.

As Maighstir said, there's no official trading mechanics on GOG. Also note that there have been a number of scamming incidences, so I suggest you read the OP of the above thread, and any links mentioned in it, and exercise caution.

This is why I won't go in that thread without my attorney present. =P

Nah, all you need is to do moose stuff, and you're golden. ;-P