Here is the full list of all 17 Card Dungeon achievements.
Kill 10 low level grunts
Make soup out of 10 turtles
Make all the boss monsters dead
Dispatch all three dragons and win the game
All journeys start with a single step
Murder 25 creatures using lava
Unlock all the trait cards
You have become death.
Visit 5 shopkeepers and buy, buy, buy!
Find and wear the sombrero
Teleport yourself 25 times
Open 50 treasure chests
Number of prayers sent to the Lords by all players
Number of creatures killed by all players
Amount of gold collected by all players
Number of Crusaders created by all players
I killed a MoleShark in Card Dungeon!