Translations:Steam/112/en
From Gentoo Wiki
Note
The wrapper script bind mounts /run so Steam can connect to D-Bus if it is running on the host. Steam will work even if D-Bus is not installed, but there will be non-fatal errors relating to Steam's bundled dev-libs/libappindicator. Steam also needs D-Bus if the Remember my password option is selected at the Steam login dialog. Refer to client troubleshooting for further details.
The wrapper script bind mounts /run so Steam can connect to D-Bus if it is running on the host. Steam will work even if D-Bus is not installed, but there will be non-fatal errors relating to Steam's bundled dev-libs/libappindicator. Steam also needs D-Bus if the Remember my password option is selected at the Steam login dialog. Refer to client troubleshooting for further details.