Yuno is the first AI tool I've used that actually understands a game project instead of just answering one-off questions. You drop in your synopsis and it builds a "Brain": characters, places, factions and how they
connect. From then on, every answer uses that context, so you're not re-explaining your world in every chat.
What stood out to me:
The Brain view. Seeing your lore as a map makes plot holes and loose threads obvious.
Context that stays consistent. It remembers who's allied with whom and doesn't invent contradictions.
Bilingual. The interface and the content language are set separately, so you can write your game in English while using the app in another language.
It's early and the free tier is limited, but the core idea is solid. If you're writing a narrative-heavy game, it's worth a try.