Microsoft Train Simulator 2 (abbreviated as MSTS 2) was a train simulation game in development by Microsoft Game Studios on two occasions. Meant to be the successor to Microsoft Train Simulator, it was originally announced in 2003, until being cancelled in 2004. The second attempt at the game was first announced on January 19, 2007 (2007-01-19), and originally scheduled for release in the last quarter of 2009. It was postponed indefinitely and virtually cancelled due to the closure of Aces Game Studio in 2009. The second project's lead designer, Rick Selby, announced in late 2008 that it was to be compatible with Windows XP, Windows Vista and Windows 7. It was being developed by Aces Game Studio (Microsoft Game Studios), known for their long line of Microsoft Flight Simulator games, as a part of the "Games for Windows" initiative. The simulation was to use a modified version of the Flight Simulator X software platform. However, with the closure of Microsoft's Aces Game Studio on January 23, 2009 (2009-01-23), development of this simulator was immediately halted.