14 DAY TRIAL // Counter-Strike: Condition Zero Deleted Scenes, a part of the original game that was stripped from the final version, is now working on Steam for Linux.
Counter-Strike: Condition Zero was not developed by Valve, but by another studio called Ritual Entertainment, best known for titles such as Star Trek: Elite Force II, SiN Episodes, and a few others.
The work they've done on Counter-Strike: Condition Zero was unsatisfactory for Valve and the project was commissioned to another party called Turtle Rock Studios.
The information about the Linux version is taken from the CDR database and by no means is it completely certain. The CDR Database is a record of data that describes every Steam game and subscription provided by Valve for the Steam service.
Usually, the new entries in the Steam database are first visible in the CDR Database before their official launch.