Here is the full list of all 16 Tiny Guardians achievements.
Revive 1000 units with Regen.
Have 12 units in your collection.
Complete 25 quests.
Get 3 stars in 12 story levels (Hard Mode).
Earn a total of 56 Stars.
Defeat the Ringmaster and earn 4 stars for that level.
Complete 12 Challenge levels.
Complete 12 Challenge levels (Hard mode).
Complete 12 Story levels (Hard Mode).
Defeat the Ringmaster.
Earn a total of 35 stars.
Complete 7 Challenge levels.
Kill 100 enemies with Starfall.
Earn a total of 15 stars.
Kill 30 units with Trap in a single level.
Earn a total of 8 stars.