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