Kill the Spider Queen.
Kill a flying enemy with an arrow.
Get killed by an explosive barrel.
Get the key to a chest.
Hit the lantern on the title screen
Headchop an enemy.
Finish the tutorial.
Get hit by your own arrow.
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.
Find the secret gate to the loot room.
Chop 15 heads enemies in one game.