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