For those that didn't hear yet, Valve has put out a beta of Counter-Strike Condition Zero: Deleted Scenes for Linux gamers.
Condition Zero: Deleted Scenes is a set of different single-player missions that were developed while Ritual Entertainment were involved with Counter-Strike development. This follow-up to the original Counter-Strike game was released back in 2004 and is a "GoldSrc" title rather than the modern Source Engine.
For those wanting to play this title natively under Linux can now find Counter-Strike Condition Zero: Deleted Scenes on Linux via Steam. The Steam entry can be found at SteamDB.info