The article discusses the poor performance of Cities: Skylines 2, a city-building game, and investigates the technical reasons behind it. The game's use of Unity 2022.3.7 and its High Definition Rendering Pipeline, as well as its implementation of DOTS and ECS, are analyzed. The article also compares the game's performance to other games, such as Alan Wake 2, and notes that it requires high-end hardware to run smoothly. The author also shares their personal experience with the game's performance issues.