Earlier this month devCAT released the announcement in a form of a trailer – however, most unfortunately, the chance has long gone for players to obtain these items.  Players who wanted the item had to undertake a short quest that saw them help the Companion Cube and Heavy Weapons’ Guy return to their home… world. When players completed this quest (which is now inaccessible), they would be randomly award one of three items: a Headcrab hat, a Combine face mask or Gordon Freeman’s trusty Crowbar.