I've found LLMs are quite good for tailored game hints where you don't want more of the story or puzzle ruined. Rather than looking up walkthroughs and hoping you don't accidentally digest something you didn't mean to, you can ask the LLM very specific questions and ask it to only answer with very specific answers.

I'm not someone who uses LLMs heavily, but I've found this kind of usecase suited my needs very nicely.