Thanks have been wanting to play the second one

thx +1

The only way of knowing is checking the winner's profile and see if the game shows in his game list. ...But, there are some games that don't show in your Steam profile game list, such as the classic Tomb Raider games... For those, it's a bit tougher to know if it was redeemed.

As for the original poster's problem, all you can do is report him to the SG support (with proof that you sent the key to him, if possible) and he'll probably get a suspension. But being a Steam key, it probably won't be rerolled (you'll still keep your GA feedback, though).

I do know that sometimes the only way for steam to show that you've got a game in your profile is via installing it. I had that problem With Serious Sam HD: the second encounter, had to install it before it showed up

This is how I did it. I'm not aware of there being any other way at the moment.

I may be mistaken, but when you try to activate a key of a game you already own, it always gives you the same message regardless of whether the key has already been activated.

And I just checked that giveaway of yours. The winner does have the game in his profile game list.

I don't think that's the case.

And how do you know which game I'm referring to?

Yup. Which DLC exactly? Don't play Missing Link until you're at least at the second area, it kinda spoils story stuff.

Question, do you need to have 100$ worth of Steam games to participate in the GOG gift club giveaways? The Steam giveaways are still confusing to me.

Yes in the sense that you need 100 $ worth of games on Steam to create a Steamgifts account and it's not possible to enter giveaways without an account.

More precise rules for the GOG Gift Club are listed here: http://www.gog.com/forum/general/steamgiftscom_gog_gift_club_v3/page1

I see, well it says I only have 79,97$ worth of games, so I'll have to pass.
Thanks the info, anyway.

I just tried it myself. I tried to activate a random key for a game that I already own. It was from an old ninja giveaway thread on Steamgifts and (supposedly) already redeemed by one of the users. It showed to me "game already owned by your acount" and not "key already redeemed by another account". Maybe too much of a coincidence? Tried again on a different thread, for a different game which I already had and already redeemed by someone else. Same result.

...Oops, I misread and assumed it was your most recent public giveaway. Yeah, there's one guy who didn't redeem from one of your public GAs (and apparently not the only gift non redeemed either, naughty naughty).

just to make it clear for people. if it says game already redeemed, it does NOT mean the key is still active.
Steam checks if you've got the game, then checks if the key is redeemed.
A used key will show up as already owned and give you an option to reinstall (handy the odd time something doesn't install / show on your inventory like its supposed to btw!). even if it has been redeemed on yours or another's account.

I believe its an open group that GOG themselves have created for their customers. And if you follow the link, just click on "join group" and then you can enter these. The giveaway has more entries than you see in a typical gog gift club giveaway. Just try it and I'm fairly confident you won't have any issues with it.

You are indeed correct - that's exactly what I've just done so Azrael, yer fine bud!