Here is the full list of all 43 Card Hog achievements.
Defeat The Final Boss
Unlock 25 items of clothing
Mind control a pile of manure
Explore the crashed alien ship
Defeat boss: Disco Alien
Upgrade an item to max tier
Survive 10 days in zombie mode
Defeat 25 knights
Swap mushroom caps
Defeat boss: Mole Miner
Ride a bull
Two hogs are better than one
Defeat boss: Honk
Remove 25 cards from the deck
Defeat 5 enemies which killed you before
One goes down, another comes up!
Get 100 item upgrades
Collect 25 food items
Go for more challenge 3 times (loops)
Defeat Spider Queen
Hit 3 enemies with a single boomerang
Add 50 cards to the deck
Rob 10 graves
Visit 25 shrines
Use various skills 100 times
Collect 1000 coins
Kill a wolf with a cleaver throw
Defeat 500 enemies
Sneeze 3 times in one run
Inspect 50 cards using RMB or SHIFT
Collect 500 coins
Defeat 250 enemies
Defeat boss: Skullington
Defeat three bosses in a single run
Defeat boss: Slimer
Defeat boss: Burns
Defeat 100 enemies