Cities: Skylines - Remastered

I recommend getting this trophy at the very beginning of construction, when there are no services in the city (which means there are no factors that increase the happiness of residents), the minimum price of land and the level of buildings (which also does not allow the population to increase their happiness). Also, at the very beginning, the population has a positive-minimum level of happiness and it is much easier to lower it to the desired 15% percent than later in an already developed and happy city.
All that is required to quickly obtain this trophy at the very beginning of city construction is: 1) Create the most uncomfortable conditions for residents (industry next to housing, a coal power plant nearby), but carefully - not so that the population immediately runs away, but so that it grows, but happiness does not. 2) As the city grows, having received the opportunity to influence taxes, raise the tax for residential areas to the maximum. 3) Just wait. :-)

You can organize it in your main city, the main thing is to make a separate save. We reduce the flow of money to utilities, police, medicine, and so on. Little by little, we raise taxes (if you raise them all at once, everything will collapse instantly, within two weeks, and there will be no one to rate you). We put wind turbines in residential areas, remove water intake from the clean zone and put it right before the waste disposal, in fact, this will lead to shit pouring out of the taps of residents. It will also be good in the policy of the districts, ban smoking, put a tick on "Old City" Saving water, energy. Enjoy.