mikec@Arch:~$ STEAM_RUNTIME=0 steam
/home/mikec/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
/home/mikec/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
Running Steam on arch  64-bit
STEAM_RUNTIME is disabled by the user
Error: You are missing the following 32-bit libraries, and Steam may not run:
libXtst.so.6
libXrandr.so.2
libgobject-2.0.so.0
libglib-2.0.so.0
libgtk-x11-2.0.so.0
libpulse.so.0
libgdk_pixbuf-2.0.so.0
Installing breakpad exception handler for appid(steam)/version(1446742416)
Installing breakpad exception handler for appid(steam)/version(1446742416)
[2016-04-30 12:10:17] Startup - updater built Nov  5 2015 08:17:57
Looks like steam didn't shutdown cleanly, scheduling immediate update check
[2016-04-30 12:10:17] Suppressing Steam update
[2016-04-30 12:10:18] Shutdown