Both Half-Life 1 and Counter-Strike 1.6 is now available as a Beta for your testing pleasure on Linux (and OS X). Purchase (if you already don’t) the game and select Properties, Linux beta.
Half-Life and Counter-Strike are available for Linux
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. … Read more