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