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.
Complete first chapter
Defeat 50 enemies
Complete level 3
Do 40 dashes
Die 27 times
Get 7 extra lifes
Die 3 times
Do 10 dashes
Block 15 proyectiles
Block 5 proyectiles
Defeat 10 enemies
Complete tutorial
Get an extra life