This is real-time strategy developed by Eugen Systems
Wargame: European Escalation, a real-time strategy developed by Eugen Systems and published by Focus Home Interactive, will be arriving on Steam for Linux.Wargame: European Escalation is not your average RTS and the Linux platform sorely needs a major title in this genre.
The fact that a Linux client actually exists was confirmed by one of the developers, on the official forums, but he also explained that a release is far off into the future.
The other part of this information 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.