Headchop an enemy.

Get the key to a chest.

Get hit by your own arrow.

Kill a flying enemy with an arrow.

Get killed by an explosive barrel.

Finish the tutorial.

Hit the lantern on the title screen

Find the secret gate to the loot room.

Chop 15 heads enemies in one game.

Kill the Spider Queen.

Kill the Lurking Horror.

Kill the Dragon Lord.

Kill the Sorcerer of Thorn.

Kill the Lich King & Queen.

Gain all five crystals.

Finish the game.