Another game that has LLM powered NPCs is the f2p action game from China called "Where Winds Meet" and players came up with all sorts of hilarious ways to cheat quests and other fun stuff via prompt injections.

https://www.dexerto.com/gaming/where-winds-meet-players-are-...

https://www.rockpapershotgun.com/where-winds-meet-player-con...