Here is the full list of all 53 Cursed Treasure 2 achievements.
Defeat the King.
Achieve rank 20.
Defeat the Archmage.
Defeat 2000 common enemies.
Damage 50 enemies with the Thunder Scroll.
Cut down 100 forests.
Cage 50 enemies with the Stasis Scroll.
Defeat an invisible Ninja.
Defeat the Arch Druid.
Defeat 50 champions.
Collect 100 mana potions.
Scare off 100 enemies.
Collect 10,000 gold picking up coins.
Get BRILLIANT for a night mission.
Achieve rank 10.
Defeat an armored Knight.
Defeat the High Priest.
Upgrade a tower to the 5th rank.
Defeat 5 enemies with one meteor.
Upgrade any skill to the max (up to 5th rank).
Defeat the General.
Defeat a flying enemy in flight.
Upgrade a tower to the 3rd rank.
Defeat an enemy carrying a gem.
Get BRILLIANT for a day mission.
Defeat a champion.
Defeat the Barbarian Queen.
Defeat the 7th boss.
Defeat the Dwarf Kings.
Get BRILLIANTS for the day missions 1-3.
Get BRILLIANTS for the day missions 4-6.
Get BRILLIANTS for the day missions 7-9.
Get BRILLIANTS for the day missions 10-12.
Get BRILLIANTS for the day missions 13-15.
Get BRILLIANTS for the day missions 16-18.
Get BRILLIANTS for the day missions 19-21.
Get BRILLIANTS for the day missions 22-24.
Get BRILLIANTS for the night missions 1-3.
Get BRILLIANTS for the night missions 4-6.
Get BRILLIANTS for the night missions 7-9.
Get BRILLIANTS for the night missions 10-12.
Get BRILLIANTS for the night missions 13-15.
Get BRILLIANTS for the night missions 16-18.
Get BRILLIANTS for the night missions 19-21.
Get BRILLIANTS for the night missions 22-24.
Upgrade all the skills of a race to the max.
Seize buildings 200 times.
Turn 50 enemies into chickens.
Make 100 mines (poisonous, energy or volcanic) of the enemies.
Remove the Charm from the towers using Terror spell 100 times.
Complete levels 16, 17 or 18 without destroying any Sacred Stones.
Defeat 50 Divers while underwater.
Find treasure chests on levels 19, 20 and 21.