Files with .uc extension contain classes referenced by main Unreal class packages (.u files). These files are used in games based on Unreal Engine like Chilvalry: Medieval Warfare. There is no real way to convert .uc files. To work with .uc files, use compatible tools. Updated: November 28, 2023. UC files fall under Game Files category with 1509 other files. They were created likely using UnrealEd program. To view or edit .uc files you need to know the format. Below is evaluation of .uc files. The .uc extension is commonly used. Programs that can open .uc files are listed below with tips. When Windows does not recognize .uc it means no default app is associated. Unreal Engine is a cross-platform tool by Epic Games that can open .uc files. They contain classes referenced by .u files with main packages.