Defeat the secret boss of Chapter 3 — it’s unlike anything else in Deltarune. To earn the Shadow Mantle — a unique armor item that makes the battle against the Roaring Knight at the end of ...

The first chapter of Deltarune was released in 2018, and there are still more to come. But speeding to a quick ending is not the point.

You need to find all the Broken Keys to unlock the prison cell and take on a secret boss in Chapter 1 of Deltarune. Here’s how to find the keys.

Our in-depth guide that covers how to take down the secret, super boss in Chapter 3 of Deltarune.