Bloodstained: Curse of the Moon
15 Achievements
1,000
8-10h
Emperor of Darkness
Sacrifice every adventurer and finish the game. Details for this achievement will be revealed once unlocked
75
1.25%
How to unlock the Emperor of Darkness achievement in Bloodstained: Curse of the Moon - Definitive Guide
You know you've done this right by level 4 if you have the all three of the crescent slash, double jump and dash abilities.
Casual or Veteran doesn't affect this achievement so choosing Casual will make it easier.
The extra moves you have will make the bosses a lot easier to defeat.
Finish the game and the achievement is yours, as is the newly unlocked Boss Rush Mode.
I had big trouble with that cause I didn't know what to do. I thought the game is glitched and reload the whole stage.
To unlock this ending, you must kill/sacrifice Mirim, Alfred and Gebel when you encounter them. Then beat the game with Zangetsu alone, with all his soul arts.
When you get to the end of the game, and defeat Gremory, you find that she charges her moon attack and Zangetsu just stands in the middle, looking up. Get to the center and hold to charge then release when fully charged to finish her off.
Beating this mode will unlock Ultimate mode and Boss Rush mode.
You can also do this on Normal Mode, if the bosses are too difficult in Ultimate. Note that you won't have any Soul Arts and cannot pick up any upgrades if you do that method.