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.
Take all the photos
Puchased all the Robo-Roids
Defeat the final boss
Steal the Botanical Bank
Purchased all the items from the dark web
Steal $1,000,000 total
Find dad's stuff
Find the Mysterious Motherlode
Defeat Uncle Rigsby
Steal $100,000 total
Defeat Mecha-Chad
Defeat the Rotten Candy Apple
Steal $10,000 total
Research a weapon
Defeat Yeehaw
Purchase a Robo-Roid
Use the weapon rack
Purchase an item off the dark web
Steal $1,000 total
Break into the Botanical Bank
Obtained all the hats
Reached the max level in weapon research
Complete all tasks