Here is the full list of all 50 Card Hunter achievements.
Complete AI hard mode
Complete all AI quests
Collect all base set legendaries
Win 1000 league games
Complete all Citadel quests
Collect all AotA legendaries
Collect all Citadel legendaries
Collect all base set epics
Complete all AotA quests
Get MP rating to 1700
Get MP rating to 1800
Get MP rating to 1600
Win 1000 ranked MP games
Complete all campaign quests
Win 100 league games
Collect all base set commons
Get MP rating to 1500
Collect all base set uncommons
Collect all base set rares
Collect all AotA rares
Collect all AotA epics
Collect all Citadel rares
Collect all Citadel epics
Complete Acquisitions Incoporated
Complete the campaign cooperatively
Get MP rating to 1400
Complete Attack of the Artifacts
Complete Expedition to the Sky Citadel
Get MP rating to 1300
Win 100 ranked MP games
Get MP rating to 1200
Win 10 league games
Get MP rating to 1100
Complete all Basic Edition treasure hunts
Get MP rating to 1000
Win one league game
Complete a quest
Complete all campaign adventures
Win 10 ranked MP games
Get MP rating to 800
Complete the campaign
Get MP rating to 500
Find the Hidden Bandit
Defend Woodhome from the undead
Find the Loot Fairy
Win one ranked MP game
Defeat Melvelous the Magnificent
Complete an adventure cooperatively
Collect one legendary item
Save Ommlet from the Kobolds