Root Letter: Last Answer is an interactive visual novel adventure game that was released for the Nintendo Switch in 2019. It's an enhanced version of the original 'Root Letter' with added live-action sequences and content. The game is set in Shimane Prefecture in Japan, where players must investigate a 15-year-old mystery involving their pen pal Aya Fumino after discovering her final letter with a confession to murder. The gameplay involves examining scenes, collecting evidence, and making choices to advance the story. It features a mix of investigation and narrative-driven gameplay typical of the visual novel genre.