FSXs

FSXs commonly denotes the Microsoft Flight Simulator X product line, including the original 2006 release and its later editions and community add-ons. Flight Simulator X was developed by Microsoft Game Studios and released in 2006 as the successor to Flight Simulator 9. It targeted personal computers running Windows and became one of the most widely used civilian flight simulators of its era. The base package introduced improved graphics, weather effects, AI traffic, and a redesigned virtual cockpit, along with a broader range of aircraft and airports. Additional editions and content releases expanded the offering, with Deluxe and Gold editions providing more aircraft and scenery, and the Acceleration expansion in 2007 adding helicopters, new missions, and further performance features.

Editions and distribution

FSXs include the standard FSX release, along with Deluxe and Gold Editions that added expanded content. In 2014, Dovetail Games released FSX: Steam Edition on the Steam platform after acquiring the rights, updating compatibility for modern Windows versions and integrating Steamworks features. The Steam Edition helped maintain a broad user base by ensuring ongoing distribution and updates on contemporary systems.

Technology and ecosystem

FSX runs on DirectX 9 with an optional DirectX 10 preview mode and utilizes the SimConnect SDK for external add-ons and tooling. It supported extensive third-party add-ons, including freeware and payware aircraft, scenery, and mission packs, which created a large, active community despite the arrival of newer simulations. The platform also formed the technical basis for later flight-simulation products, with many developers continuing to port or adapt content across generations.

Legacy

FSXs remain notable for their large modding ecosystem and influence on later simulations. While newer platforms have emerged, the FSX framework and its community-driven expansion continue to be cited as a significant milestone in PC flight simulation history.