I've been using Gemini 2.5 Pro for the past 2 weeks to run a narrative adventure in the setting of Blue Archive. I don't know anything about this shit, so it was a week of trial and error before that to figure out how to avoid narrative drift. But now it's more or less flawless after I figured out what a Context Window is and how to work around it.

The current end result is, this; A song composed by the main protagonist of the story based on the events up to that point. I used Suno to generate this.
https://files.catbox.moe/r6ofpg.mp3

I am really impressed on both accounts. Currently more entertained than any video game could serve me.