When I installed Steam (I was using Sparky 4.1, kernel 4.1, now Sparky 4.2, kernel 4.2.0-1-amd64), I found it would not run. However, after visiting an Ubuntu forum, I found that executing the following command from the command line:
LD_PRELOAD=’/usr/$LIB/libstdc++.so.6′ DIAPLAY=:0 steam
that steam would work. I have written this command into a script which is executed by clicking onto my edited steam shortcut. I am using SparkyLinux 4.2 Xfce x86_64, kernel 4.2.0-1-amd64 on an Acer Aspire 5745G Laptop using the xserver-xorg-video-nouveau 1:1.0.11-1+b1 amd64 X.Org X server -- Nouveau display driver.