The game never tells you this, but the corruption meter has a secret fourth stage beyond 100%:
But there’s a hidden state at exactly 50%. If you enter the final temple with exactly 50 corruption:
How to achieve 50%: Follow the steps above – spare rabbit, break altar, sibling bond, reject both romance options. Then in Chapter 4, take exactly two hits from Azazel’s minor spell (Hellish Prickle) – each raises corruption by 5%. Start from 40% after Chapter 3. demon boy saga walkthrough guide exclusive
This is exclusive to this guide. To unlock the secret final dungeon, you must break the Three Seals before entering the final tower.
The labyrinth of living shadows is tedious. Here’s the secret: The game never tells you this, but the
Boss: The Warden of Echoes – He copies your last used skill. So before the fight, use a Potion of Dull Mind (craftable from the Scorch-Rabbit’s leftover berries). He’ll copy “Stare Blankly,” wasting his turn for three rounds.
"Cursed Choices Tracker – Unlock All 3 Demon Paths (Neutral / Corrupted / Redeemed)" But there’s a hidden state at exactly 50%
Objective: Escape the prologue without killing any humans.
Most new players kill the possessed villagers here. This locks you out of the best ending.
Boss: The Demon King (True Form)
The early levels of the game are relatively easy, and you'll get familiar with the gameplay mechanics. Focus on collecting coins and power-ups while defeating enemies. Make sure to use your basic attack and jump abilities to navigate through the levels.