bash-4.3$ steam
Slackware 32-bit: Check the 'deps/<slackwareversion>' directory where you downloaded this package and install/upgrade the packages you find there.
Slackware 64-bit multilib: Install/upgrade the packages in the 'deps/<slackwareversion>/multilib' subdirectory instead.

Running Steam on slackware 14.1 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(0)
*** stack smashing detected ***: /home/ecaz/.local/share/Steam/ubuntu12_32/steam terminated
crash_20160102013355_1.dmp[6646]: Uploading dump (out-of-process)
/tmp/dumps/crash_20160102013355_1.dmp
/home/ecaz/.local/share/Steam/steam.sh: line 756:  6643 Segmentation fault      $STEAM_DEBUGGER "$STEAMROOT/$STEAMEXEPATH" "$@"
crash_20160102013355_1.dmp[6646]: Finished uploading minidump (out-of-process): success = yes
crash_20160102013355_1.dmp[6646]: response: CrashID=bp-aa9736d9-b1bf-4dd5-af95-200642160101
crash_20160102013355_1.dmp[6646]: file ''/tmp/dumps/crash_20160102013355_1.dmp'', upload yes: ''CrashID=bp-aa9736d9-b1bf-4dd5-af95-200642160101''
bash-4.3$