Flight Sim Toolkit is a feature-rich package of tools with which you can create your own custom aircraft, worlds, and challenging flight sim scenarios.

A Windows based set of tools allows you to save your creations as stand-alone DOS games. These tools include a world editor with which to create custom landscapes, a shape editor that allows the creation of objects (e.g., trees, cars, houses) that can be placed on the landscape, a color editor that allows control over the game's palette, a cockpit editor with which to develop the in-cockpit graphics, and a model editor with which to develop flight models for aircraft.

FST includes a fully working, flight simulation game called "Top Gun". Aside from being a game that can be played in itself, players can opt to use the tools in FST to alter elements of Top Gun into a whole new gaming experience.