Here is the full list of all 53 Cursed Treasure 2 achievements.
Defeat 50 champions.
Scare off 100 enemies.
Achieve rank 10.
Get BRILLIANT for a night mission.
Upgrade any skill to the max (up to 5th rank).
Get BRILLIANTS for the day missions 1-3.
Defeat the General.
Defeat a flying enemy in flight.
Defeat 5 enemies with one meteor.
Defeat an armored Knight.
Upgrade a tower to the 3rd rank.
Get BRILLIANT for a day mission.
Defeat a champion.
Defeat an enemy carrying a gem.
Defeat the High Priest.
Defeat the Arch Druid.
Defeat the Archmage.
Defeat the King.
Defeat the Barbarian Queen.
Defeat the 7th boss.
Defeat the Dwarf Kings.
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.
Achieve rank 20.
Upgrade all the skills of a race to the max.
Upgrade a tower to the 5th rank.
Cut down 100 forests.
Seize buildings 200 times.
Cage 50 enemies with the Stasis Scroll.
Damage 50 enemies with the Thunder Scroll.
Turn 50 enemies into chickens.
Collect 100 mana potions.
Collect 10,000 gold picking up coins.
Defeat 2000 common enemies.
Defeat an invisible Ninja.
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.