“What is an app? A miserable little pile of secrets!” At least, that may well apply to this particular app — Konami just released a mobile version of genre-defining side-scrolling action-RPG classic Castlevania: Symphony of the Night seemingly without announcement or warning.
https://www.theverge.com/2020/3/4/21164298/castlevania-symphony-of-the-night-ios-android-version-released-price
https://www.theverge.com/2020/3/4/21164298/castlevania-symphony-of-the-night-ios-android-version-released-price