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