LEGO City game has never been released for PC, so it has no PC system requirements. It came out on iOS. Released in 2016.
Running LEGO City game on a computer
There is no emulator for iOS that this site will point you at.
Games of the same series that run on PC
LEGO Bricktales
LEGO Builder’s Journey
LEGO DC Super-Villains
LEGO The Incredibles
LEGO The Hobbit
LEGO The Lord of the Rings
Where LEGO City game can be played
Platforms: iOS.
