Way to make bots chase you on sight?

[Luigi609²]

I know zombies sort of do this, but I want to remake The Joy of Creation: Reborn, so I need the bot to chase you in a straight line only if it spots you.
Here's an example (excuse the man screaming)
https://youtu.be/4E3ENQTwTvk?t=5m47s

[Ad Bot]