Kill the hero in every possible (ghost-controlled) way

Have 3 upgrades at a time

Kill the hero with an egg that flew a long distance in a straight line

As a slime, land on hero’s head

Deflect an egg into the bird that dropped it

As a ghost, kill a monster possessed by another ghost

Complete a level with a top hat

Beat a level killing every monster

Beat arcade mode with 0 deaths

Beat arcade mode without collecting a single crystal

Publish a map to Steam Workshop

Beat arcade mode

Kill the same opponent 3 times in a row

Beat the tutorial

Unlock arcade mode