Here is the full list of all 31 Kids of Hellas: Back to Olympus achievements.
Find 40 puzzle pieces!
Complete any level with three stars without using any bonuses!
Encounter a patrolling enemy 30 times!
Cancel a task 30 times!
Repair the ancient Greek ship!
Complete 10 levels with 3 stars!
Activate the "Freezing time" bonus three times on the same level!
Find 20 puzzle pieces!
Erect 30 buildings!
Gather 500 units of gold!
Use all the bonuses at least once while playing the game!
Complete 10 levels!
Assign 1000 tasks to the kids!
Find 10 puzzle pieces!
Encounter a patrolling enemy once!
Use your skill 20 times!
Summon 5 kids simultaneously!
Gather 500 units of food!
Activate the "Speed up character" bonus three times on the same level!
Gather 100 units of gold!
Use two bonuses simultaneously!
Use your skill
Complete the level without using skills!
Repair the mana well!
Gather 100 units of food!
Cancel a task!
Complete one level with 3 stars!
Complete the 1st level!
Find the first puzzle piece!
Complete 30 levels with 3 stars!
Earn all the achievements!