According to HowLongToBeat , completing the main story takes about 30 hours , while a completionist run can take nearly 60 hours . Key Tips for the Complete Experience
As an "Eroge" (adult) JRPG, the Steam version often requires an official R18 restoration patch (usually provided for free by the publisher, Shiravune, on their website) to access the complete, uncensored story and scenes.
Demons Roots on Steam. In a final struggle for survival, demonkind again invaded the human world. Demon Roots English Guide - Steam Community
There is a locked chest early in the game that requires a password. The code is 1936 , which rewards you with an Ultimate Scroll that increases instant-kill chances.
If you are looking for specific "secrets" or content often sought after in downloads:
