Tips for The Devil Hat Achievement
You have to deal 1000 damage in a single hit!
Risu’s “Deez” ability does a fixed 25% damage to non-boss targets. If the target has at least 4000 HP, you’re guaranteed to do 1000 to it should the skill proc.
A lot of enemies that act as walls tend to have stupid amounts of health that this works on.
As a bonus, there’s an enemy near the end of Hard 1 that has enough HP to trigger the 10k achievement with this move.