Install Steam through ubuntu ppa:
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sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B05498B7
sudo add-apt-repository "deb http://repo.steampowered.com/steam/ precise steam"
sudo apt install steam
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from:
https://www.ubuntuupdates.org/ppa/steam
https://www.dedoimedo.com/games/steam-linux-mint.html