Full list of all 13 Horned Knight achievements worth 1,000 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements on Xbox One.
Die 3 times
Die 27 times
Defeat 10 enemies
Defeat 50 enemies
Block 5 proyectiles
Block 15 proyectiles
Get an extra life
Get 7 extra lifes
Do 10 dashes
Do 40 dashes
Complete tutorial
Complete level 3
Complete first chapter