I still remember myself trying to play Counter-Strike under Linux using WINE or Cedega. A couple years later, today, somebody told me that Valve releases both titles through Linux Steam client — beta no more. All you have to do is go to Steam, search for Counter-Strike and Half-Life, purchase them, download next, and frag ‘n kill. Furthermore, there have been unconfirmed reports that, apart from Half-Life and Counter-Strike: Source, 3 more games have been released for Linux. They include Shank 2, Closure and Psychonauts.