To me, AI is more than just the behavior of the agent NPCs. Its also about the overall world environment and how the world and gameplay mechanics work. There is

To me, AI is more than just the behavior of the agent NPCs. Its also about the overall world environment and how the world and gameplay mechanics work. There is a lot of untapped potential in simulating world behavior. For example, the "director" in Left for Dead games increased or decreased the difficulty depending on how the players navigate and play through the map.