“Quoting Clem here; “Just as “killer-apps”, games are among the top reasons which prevent people from switching completely to Linux. In 2012, 15 games were scored 90% or higher on Metacritic. None of them were released on Linux...At the end of last year, Valve and Canonical announced they were working together to bring Steam (which is estimated to have a 70% share of the digital distribution market for video games) to Linux...Valve is planning a new gaming console in 2013 based on Linux and the company is currently promoting its Linux client, even to its Windows users. Gaming media, blogs and magazines are covering the news and some of the major studios are considering porting their games to Linux.” unquote.
With 70% share of the digital distribution market for video games, Steam would be most wanted by new windows converts. In fact, by including Steam, Linux Mint would get financial support from Valve Corporation, the company behind it.