Here is the full list of all 23 Turnip Boy Robs a Bank achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Obtained all the hats
Complete all tasks
Reached the max level in weapon research
Take all the photos
Defeat the final boss
Steal the Botanical Bank
Defeat the Rotten Candy Apple
Defeat Yeehaw
Purchased all the items from the dark web
Steal $1,000,000 total
Find dad's stuff
Find the Mysterious Motherlode
Puchased all the Robo-Roids
Defeat Uncle Rigsby
Use the weapon rack
Purchase a Robo-Roid
Purchase an item off the dark web
Research a weapon
Steal $1,000 total
Steal $10,000 total
Steal $100,000 total
Defeat Mecha-Chad
Break into the Botanical Bank