Complex AI Examples

So, just wondering if anyone knows of any examples of more complex behavior tree AI. I’ve read the docs and a lot of other stuff online, watched a number of videos including the Epic ones on AI. So I have an understanding of all the pieces of the system. The problem is that all the docs, videos and examples just show very basic stuff. Like making an AI wander around or make them chase the player, stuff like that. I’m trying to build something a bit more complex where the AI has some goals it is trying to achieve, but also has a few needs that it tries to keep fulfilled. I’m getting really stumped over how to architect this and can’t find any complex AI examples to study and learn from.