There are a lot of special achievements in "Frost Age 2", and Frost City is one of them. To do this achievement, you only need to apply at least 5 different regional effects to an area. This It is not too difficult not to do something deliberately, but it will be very difficult if you do it deliberately.
How to get the Frost City achievement in Ice Age 2
City of Frost
Apply at least 5 different area effects to a region
Location: Story or Utopia Builder
Similar to the City Planner achievement, but this time you want a single area with 5 different buffs.
I usually build my housing areas with gaps between them to squeeze different centers between them.
FrostCity
Have at least 5 different area effects applied to the district
Location: Story or Utopia Builder
Similar to Urban Planner achievement, but this time you want a single district with 5 different buffs.
I usually build my Housing districts with gaps between them in order to squeeze different Hubs between them.