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To us, if the game has visuals and text you primarily interact with, then its a visual novel! Omegabutton also gave a really good answer earlier: "We don’t have a formal metric for that, so if you think it’s a visual novel with RPG elements rather than an RPG with visual novel elements, you’re probably fine!" I also suggest playing not only bad visual novels submitted in the past, but also some good ones here on itchio so you have a better idea!