Left4Dead (1&2) featured a persistent "Director" AI that altered the player experience (sound, number of enemies, health, etc) based on what it observed the pla

Left4Dead (1&2) featured a persistent "Director" AI that altered the player experience (sound, number of enemies, health, etc) based on what it observed the player does. You don't need a particularly advanced AI/ML to get the experience this slide deck describes.