Choose the symptom first. A missing title-screen DLC label calls for an activation check; locked characters call for a progression check. Deep of Night instead requires Night Aspect completion and an online connection. Steam and console patch numbers may differ.
Sources
We checked these official pages and wrote the steps in our own words. Follow the publisher’s page if it has changed.
Official DLC activation and unlock guide (Japanese)Official Deep of Night requirements (Japanese)Steam update, July 2, 2026 (Japanese)PS4/PS5 update, September 18, 2026 (Japanese)Steam: game details, languages and requirementsJapanese version of this page