I'm surprised I hadn't heard of this one before! A few developers have been building Nazi Zombies: Portable, a Call of Duty: Zombies demake powered by various enhanced forks of the Quake engine.
Experimenting with YOLOv8 Object Detection to detect objects in Call of Duty: World at War - Nazi Zombies. The current YOLOv8 model was ... an initial test to detect the AI and have another AI play ...