Follow the indicated steps to earn the corresponding Steam achievement. To view your achievement progress and stats, open the Steam client, select "Community", then search for the game hub for "King's Guard TD". Click the "View Stats" option in the drop down list, then select the option that displays the achievements for your account.

Achievement	How to unlock
Arrow Towers	Build 3 Arrow Towers.
Blood	5,000 Enemies killed.
Destruction	30,000 Enemies killed.
Dragon Killer	1,000 Dragons killed.
Legacy	15,000 Enemies killed.
Mage Extinction	1,000 Mages killed.
Moraenul	Defeat the Lord of Dragons.
Mytina	Complete Call of Dragnor Campaign.
Tristen	Complete Dark Revenge Campaign.
Warriors Down	2,000 Warriors killed.