Here is the full list of all 21 Glittering Sword achievements.
Kill the wolf
Kill the bat
Kill a spitting plant
Kill the spider in the grass
Kill the bee
Destroy the hives
Kill Kotokong
Kill the digger
Use a healing potion
Use Mana Bottle
Buy a bottle of health
Buy a bottle of mana
Don't have time to save the princess
Rescue the princess
Kill the first boss
Kill the second boss
Kill the skinny twin
Kill the Fat Twin
Kill the fourth boss
Kill the final boss
Open chest