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