Microsoft Flight Simulator is described as 'Immerses you in a beautifully rich and realistic world with dozens of aircraft and interactive Missions for a completely new and innovative gaming experience. Free Flight lets you fly anywhere in the world, from your hometown airport to the most exotic' and is a flight simulator in the games category. There are more than 10 games similar to Microsoft Flight Simulator for a variety of platforms, including Windows, Android, iPhone, iPad and Linux apps. The best Microsoft Flight Simulator alternative is FlightGear, which is both free and Open Source. Other Microsoft Flight Simulator like games are Rigs of Rods, X-Plane, Prepar3D and GeoFS.
It's free and open-source, and that means I like it!