Kill an undead... using the toilet.

Kill a vampire mid-air.

Head Nymph Betilla is Free!

Buy a weapon from Charon.

Clear a stage with only headshot kills.

Hit the lantern on the title screen

Get hit by your own arrow.

Kill the Lich King & Queen.

Kill a flying enemy with an arrow.

Find the secret gate to the loot room.

Kill the Lurking Horror.

Get the key to a chest.

Finish the tutorial.