Here is the full list of all 37 Gas Station Simulator: Prologue - there are Early Days achievements.
Served 50 custoemrs in the shop.
Fueled 50 cars.
You let it run away from you didn't you?
Got a total of 50 tips during minigames.
Cleaned up 100 Floor Stains
Cleaned up 100 Trash Items
Broke into 20 car trunks.
Painted 25 Objects
A flying car. Who would have thought? Not us.
Broke into 10 car trunks.
Fuel a car within 0.01L of the requested fuel.
Gas Station Simulator Prologue Completed
Cleaned up 50 Trash Items
Painted 10 Objects.
Got a total of 10 tips during minigames.
Served your first customer in the shop.
Fueled 10 cars.
Bought / Found a decoration
Broke into a car trunk.
Painted something!
Scared off Dennis.
Ordered a Garbage Truck to collect your trash.
Cleaned up 25 Floor Stains.
Cleaned up one floor stain.
Fuel a car within 0.1L of the requested fuel.
Picked up a trash item.
Fuel a car within 0.2L of the requested fuel.
Fuel your first car.
Got a tip during a minigame.
Complete a race in the RC Car.
Ordered fuel to be delivered to the Gas Station.
You found "Rudy"
Hit trash can with a score of over 50!
Hit trash can with a score of over 25!
Hit a trash can!
Managed to get really high into the air.
You've been visited.