I was thinking of a addon similar to the Colonies with the Antlions and Headcrabs, but only with humans and Combine (maybe a little zombie ). The Combine/humans get hatched from a egg (or something a little more inappropriate ) and zombies come from headcrabs + dead bodies and they have jobs such as farming and defending against neighboring colonies/tribes. They get weapons when they get more populated. I am no lua coder or whatever but maybe someone can try doing this?
EDIT: Oh shit I’m sorry wrong fourm to post on T_T.