Here is the full list of all 31 Iron Fisticle achievements.
Complete the game
Reach max level
Get garlic breath
Collect 1000 coins
Collect 10 golden goblets
Complete the bonus game
Get the golden turd
Get the golden bananas
Collect all rainbow gems
Complete the third floor
Collect 100 items in the ledger
Collect a giant piece of cake
Collect 5 diamonds
Complete The Graveyard
Open 100 chests (any type)
Make lemonade
Kill 1000 Frankies
Level up ten times
Complete the second floor
Collect all letters spelling B-O-N-U-S
Complete the first floor
Buy a gold item in the shop
Complete The Catacombs
Kill a golem
Complete the first room
Complete a room without losing any health
Level up once
Kill 10 enemies using dash
Complete a room when entering with only 1 health
Collect 100 treasures
Collect all hint books