Here is the full list of all 29 Card Quest achievements.
Considerably reduce the rat population in the City.
Buy one of the special offers in Alley Town's shop.
Eat a royal sausage.
Reach the epicenter of the plague.
Stop the spread of the plague.
Help the city guard clean the streets of High Town.
Kill the King in the City.
Kill the 3 different types of horror that can be found in the City (Hulking, Festering and Burning Horror).
Destroy a goblin village.
Destroy the Harpy Nest.
Reach the Peak in Dwarven Mountains.
Kill Skelfilegur, Ijotur and the Great Modir in the Mountains.
Kill a Giant Boar and a Cave Bear.
Finish the Forgotten Ruins.
Kill the Moontouched and Hans Mooncursed.
Kill the Great Spinner, the Spider Huntress and the Spider High Master.
Finish the Deep Gardens without killing any Nymphs.
Kill 6 different Kings (the King, Dwarven King, Fairy King, Forest King, Shadow King and Forgotten King).
Complete all trainings.
Finish the Cursed City adventure.
Finish the Dwarven Mountains adventure.
Finish the Enchanted Forest adventure.
Have your hero reduce his intellect considerably.
Meet Jacknives in Alley Town after finishing the Rogue Training.
Collect all 9 wizard familiars.
Become a demon.
Have your hero come back to life.
Have more than 1200 gold in one run.
Collect all items in the game.