The Golden Piano Puzzle is the key to getting to the Chapter 4 secret boss in Deltarune.In the old man’s study, you’ll find a dark door, which you need to enter. Go towards the right, and you ...

The Hammer of Justice is the secret bonus boss of Chapter 4 in Deltarune — and he’s a very different kind of boss. To encounter him in Chapter 4, you’ll need to find three hidden piano ...

Deltarune Chapter 4 is packed with new challenges, secrets, and intense battles, and one of the most exciting ones is the Hammer of Justice, a hidden boss fight.