No NPC animations

Most of the NPC’s don’t move , they just stand with their arms out , some of the animations work such as when I’m being attacked by a crab head .
I’ve re-installed the game already & used the -autoconfig switch but it’s still the same. I’ve never seen this bug before in any of my other Steam games.
Opening the console reveals lots of missing files & Var’s .

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.