It has to be the auto-playing Tomb Raider agent, where LLMs were used to give Lara self-awareness. I've never seen anything like it.
It starts off with some classical computer vision shenanigans to understand the character movement, map layout, and to create the 'desire' to explore. Then the LLM is given input of images, sound descriptions and prior thoughts, lettting Lara remark on the situation, which feels very surreal and, at least for me - very unexpdcted. E.g. she hears the wolves howl and wonders how they survived in this environment. Or meta-remarks on game music changes.