Here is the full list of all 40 Cities: Skylines II achievements worth 1,000 gamerscore.
Build city with residential, commercial and industrial zones, water, and electricity.
Have a look at each individual info view panel.
Create a city district and assign a city service to that district.
Reach enough milestones to unlock all city services in a single city.
Unlock each building available in the base game.
Reach a population of 100,000.
Have 20 active transport lines. These can be passenger or cargo lines or any mix of the two.
Experience a hailstorm.
Experience a tornado.
Experience a forest fire.
Have a city that produces electricity by only using renewable energy sources.
Build any airport.
Build 5 signature buildings in a single city.
Unlock 150 map tiles in a single city.
Have 5 city policies active simultaneously.
Create 10 different districts in a single city and assign policies to each.
Assign a policy to a city district.
Have at least 1000 citizens and an average happiness rating of 75%.
Follow a citizen's lifepath from childhood to old age.
Listen to two different radio stations around the clock each.
Use the editor to make an asset of any other type than map.
Use the editor to make a map.
Unlock 50 map tiles in a single city.
Reach milestone 20.
Build 10 signature buildings in a single city.
Experience a rat infestation.
Experience all four seasons by building a city in a climate with a snowy winter.
Have 50 active transport lines. These can be passenger or cargo lines or any mix of the two.
Have at least 1000 citizens and an average happiness rating of 25%.
Have at least 1000 citizens and a city attractiveness rating of 90.
Build a city where at least 20% of the population has a university level of education.
Use the photo mode to take a screenshot
Have a total loan of at least 200,000 in a single city.
Build 10 parks in a single city.
Plant 100 trees or bushes with the landscaping tool in a single city.
Have buildings from all four zone types in a single city.
Bulldoze a total of 1000 buildings.
Have 10,000 citizens treated at medical clinics or hospitals in a single city.
Have a total of 10,000 tourist visits in a single city.
Build all unique city service buildings in a single city.