adult version; adult edition
Refers to a version of something (book, game, product) intended for adults, often implying more mature content, complexity, or features compared to a standard or children's version.
This game has an adult version and a children's version.
The adult edition of the picture book deals with deeper themes.
Compound of 大人 (おとな, 'adult') and 版 (ばん, 'edition/version').