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