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