Bugs:
-The humans dont attack and just run away.
-When an enemy sees another enemy it sometimes bugs out so that the enemy that saw the other enemy just stands in one place and doesnt do anything. (only for antilions i think)
-when an antilion attacks a headcrab it gets stuck ontop of it with its belly facing upwards. (aka insta death for antlions if not turned over)
-Headcrabs get too much and start starving fast. (idk if this was intended)

Suggestions:
-Queens (Only the queen can lay eggs and make nests) (queens can be some kind of a colored npc or a special npc for every type: fast zombie for zombies, antilion guard- small and less dmg for antilions, poison headcrab for headcrabs and alyx for humans.) (also all queens have a small regen and infinite age, well it may not be infinite idk how you guys will make it)
-Nests (there can be multiple nests of headcrabs for example and they attack each other) (it can be more like capture points)
-Classes (Each npc has a designed role thats randomized for it upon birth, queen being the only exception)
-Humans crafting things and weapons. (they will chop down the trees for resources)
-Maps specificaly designed for this mod.

This is a great mod and i love it so far, so keep it up guys!