Valve has fixed NPCs not blinking in Half-Life 2, its 15-year-old shooter that may never see a sequel.
That's not all. Valve has also fixed missing sounds on Combine soldiers, fixed a hitch when saving games, and fixed SteamVR running when entering the settings menu.
The update is for Half-Life 2, Half-Life 2: Episode 1, Half-Life 2: Episode 2, Half-Life 2: Lost Coast, and Half-Life: Source. So, all the Half-Life 2s!