Here is the full list of all 15 The Tower Of Elements achievements.
Made 100 Combo
Made 200 Combo
Unlocked all other achievements
Got 500 Points
Got 1000 Points
Got 1300 Points
Upgraded the Tower 10 times
Upgraded the Tower 20 times
Upgraded the Tower to maximal level
Collected 4000 Mana Point in Total
Collected 20000 Mana Point in Total
Collected 45000 Mana Point in Total
Unlocked 1 new Mage
Unlocked 5 Mages
Unlocked 10 Mages