Steam is a digital distribution platform developed by Valve Corporation offering digital rights management (DRM), multiplayer gaming and social networking services.

Steam requires multilib if using a 64 bit system.

The steam installer can be be had by installing the steamclient package from AlienBob. On running Steam the first time it downloads some libraries and and sets itself up.

Slackware-14.2 switched to pulseaudio; if pulseaudio is not working as expected sound may not work in steam. The following fix could be tried if sound is not working:

# mv /var/lib/dbus/machine-id /var/lib/dbus/machine-id.bak
# ln -s /etc/machine-id /var/lib/dbus/machine-id

Source: https://github.com/ValveSoftware/steam-for-linux/issues/1179#issuecomment-26445442

Steam (and games) may require certain libraries for functioning correctly, like OpenAL and libtxc_dxtn (for multilib the compat32 versions would need to be installed as well).

You may need to map the controller buttons by going to Steam Big Picture mode → Settings → Controllers.

Source: http://steamcommunity.com/app/238460/discussions/1/540741858956217983/?ctp=2#c540741859210052192

https://wiki.archlinux.org/index.php/Steam

http://alien.slackbook.org/blog/valves-steam-client-for-linux/

http://alien.slackbook.org/blog/steam-games-in-slackware/