Missing Games in "New Giveaway"-Window

yep - http://www.steamgifts.com/about/guidelines

That's because they've been given away for free in mass, and you can't give away free games on SG.

They get removed from the GA list to prevent it.

Beta keys, guest passes, coupons, and free games should not be given away.

Source - http://www.steamgifts.com/about/guidelines you may wish to read that before continuing on the site to make your stay more pleasant. :)

They were free, that's why

Big thanks to all of you :)