The .cap file extension is most commonly used for game development files. These files are created by the Scirra Construct programming application to create DirectX 9-based computer games. The CAP files contain the background images, objects, event handlers, physics models and other code used to create the game.
The .cap file extension is also used for compressed music files, Network Associates Sniffer capture files, CaptionMaker caption files, Code Architect project files and PacketView Pro packet trace data files.
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If you have additional information about the CAP file format or software that uses files with the CAP suffix, please do get in touch - we would love hearing from you.