New footage in a development documentary for Half-Life 2 showcases a weapon called the Ice Gun for the cancelled project.
The update adds hours of developer commentary to the base game alongside support for Steam Workshop and improved lightmaps.
From untold horrors lurking in the cosmos to an utter sense of insignificance in the greater scheme, Valve's shooter franchise nails these aspects flawlessly.
A new interactive book from Geoff Keighley spills all the details.
