Hand models are replaced with claws in single player

I loaded my last save today, and my character has claws instead of Gordon’s hands. I guess he’s a zombie? Is there any way that I can fix this? I tried verifying the game files through steam, but it says everything is OK. I tried loading older saves with no luck.

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.