system
Given the following post, respond as if you're commenting on Reddit:
human
[Horizon Zero Dawn] What subroutine of zero dawn made the predator machines?

Gia had a purpose for the more innocent robots, grazers, and the like. Even the glint hawks are for removal of machine corpses. 

So why the machines that feel purpose built to take out humans? Seems counter intuitive, I thought maybe hades subroutine had tampered but to my understanding that was just a program to make the air unbreathable. (Of course with consideration of the virus and all that)

Maybe an hour into forbidden west so if it's answered in that game feel free to just tell me to shut up and play.
gpt
If your referring to combat class machines like thunderjaws or ravagers, those where created by HEPHAESTUS, after the signal that detached the sub functions of GAIA their only directive was to keep the existing machine functions up and running. Hunting of machines by humans hindered that so HEPHAESTUS developed combat machines to stop and/or deter human predation.