Here is the full list of all 25 Shoppy Mart: Steam Edition achievements.
RIP Headphone users
You've reached level 10 and unlocked the new register!
Unlocked ???
Unlocked Veteran
Completed 500 Orders Successfully
Scan 1000 Items
Scan 500 Items
Unlocked Stoner
Scan 100 Items
Unlocked Crazy Hobo
Unlocked Rapper
Unlocked EDM Producer
Unlocked Writer
Unlocked Rosanne
Unlocked Buttface
Completed 100 Orders Successfully
Unlocked Larry
Unlocked Albert
Completed 10 Orders Successfully
Unlocked Jimmy
Scan 10 Items
Reached Hell
Completed Shoppy Mart: Steam Edition
Unlocked I'm With Stupid
Unlocked Nova