Files with the .ct file extension are most commonly associated with the Cheat Engine open source Windows-based game "cheat" application. Cheat Engine creates gaming modifications or "cheats" that make game play easier. The CT files contain the cheat files that are created with the application.
The .ct file extension is also used for IRIS CT image format files, SciTex continuous Tone bitmap image (32bit CMYK) files, Contone printer files and CTwin project files.
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