Best use of AI in video games you've seen?

Video games have had AI for about as long as video games have been around. Even Pong has an AI. This is an important distinction, because there is decades of research on the topic that gets confusing if people misinterpret the concept.

But to answer your question, there's a really impressive Skyrim mod that allows you to voice chat with NPCs in near-real time (capable of 5 second response times with some good hardware): https://www.nexusmods.com/skyrimspecialedition/mods/98631

The AI of F.E.A.R.

https://www.gamedevs.org/uploads/three-states-plan-ai-of-fea...