On , Microsoft announced that it was permanently closing its Aces Game Studio, the internal development studio responsible for the "Microsoft Flight Simulator" series and the development of "Microsoft Train Simulator 2". As a result, all future development on "Train Simulator 2" (which was just entering the final stages of development at the time of closure) was immediately halted, marking the second time that this project was terminated. A week later, Microsoft issued the following official announcement from "Train Simulator Insider".