Complete the Trials of Muspelheim

Collect one flower from each of the nine realms

Fully repair the Amulet of Yggdrasil

Collect all of the Books

Obtain all of the Apples of Iðunn and Horns of Blood Mead

Complete all of the Crater Hunts

Complete the game on Easy.

Kill an enemy by attaching a Remote Bomb to them and detonating it.

Escape from the Baker family home.

Uncover the secret in the old house.

Fight off Marguerite while she wanders the old house to make her run away.

Increase your item slots.

Finish off an enemy with the knife.