So basically their own fork of Wine? A DirectX Linux wrapper backed and supported by Valve. And most likely it will come with SteamOS 3.0 which is rumored to be

So basically their own fork of Wine? A DirectX Linux wrapper backed and supported by Valve. And most likely it will come with SteamOS 3.0 which is rumored to be launched soon (pending Valve Time) https://www.gamingonlinux.com/articles/looks-like-steamos-30-is-on-the-way-codenamed-clockwerk.12208 https://www.gamingonlinux.com/articles/looks-like-steamos-30... It's also important because Valve drops the support of XP and Vista in January 2019. https://support.steampowered.com/kb_article.php?ref=1558-AFCM-4577 https://support.steampowered.com/kb_article.php?ref=1558-AFC...