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