If you answer [to] the "annual GOG survey", until September, 17th, 2012, then you can get the first two Realms Of Arcania games for free ! http://www.gog.com/news/gogcom_annual_survey_get_a_game_for_free
Remember that this goes only until the 17th this month.
I don't know if you need to have an GOG account for getting it - I tend to believe that yes, you need one, but it is nowhere explicitely stated (or I have overseen it), but at least you'll need an E-Mail address.
This seems to be "giftable" as well, according to this GOG page, although I don't know how.
On a different matter : http://www.stopzombiemouth.com/
You should look at this as well, because it's a fair game.