Scenario file containing level or mission data for a specific video game; may include maps, characters, objectives, and other data; typically installed within the same directory as the game itself; similar to a mission (.MIS) file used by other games.

SCX files are used by Maxis Sim City 2000, LucasArts Star Wars Galactic Battlegrounds, and the Blizzard StarCraft Brood War expansion pack.

Scenario file used by Microsoft real-time strategy games; contains level or campaign data for specific missions; typically installed within the same directory as the game itself.

SCX files are used by Microsoft Rise of Nations, Age of Empires II, and Age of Mythology.

Project file created by SuperCard, a visual authoring tool for Mac OS X; stores data for a help project, which contains indexable help content; similar to a .SCH file, but also includes additional functionality provided by code resources compiled with Apple Xcode for SuperCard's external command/function interface.

SCX files are used for extending both SuperCard and the SuperCard Help System.