The Polish GNU/Linux game reseller Wupra games announced that if you buy 2 GNU/Linux games, you will get to choose the third game for free.
Among the games you can get for free are :
Defcon
Enemy Territory: Quake Wars
Neverwinter Nights: Diamentowa Edycja
Postal: 10th Anniversary
Prey
Saga Goblins
Unreal Antologia
Just write in the order comment which game you wish to get for free.
Note that some games are in Polish only, for more clarification read here or email Wupra.
This promotion runs from 13 to 31 August 2010