What have we done here ?
This looks like an upgraded mod, not actually. Of course, we don't talk too much nonsense, just introduce the mods feature directly:
Rewrite npc ai
HD textures
Headcrab can parasitize humans
Puppet doll physical effect
Add new weapon
Add display life value system
Add a shadow effect
Add more monsters npc
Add more effects
Recompile some original maps
Add more boss battles
