Did you ever think Half-Life was way too easy? Hard-Life corrects that issue.
The grunts have seen one of the largest overhauls of nearly any unit in the game. They have a plethora of options in how they can spawn. They have variations or heads, helmets, gear, sleeves, weapons, and extra loadouts. They come packing PCV vests and will require smarter tactics to take them down!
Gas mask grunt with long sleeve, He reminds me of this addon Gamebanana.com