File with .MIR extension contains SafeDisk disc image in compressed form that stores only the necessary data to run the game. Image file size is only about 23 MB and excludes data not used by the game. Not all SafeDisk discs can be converted into MIR image, and not all MIR images can be emulated with Daemon Tools software as the extension is not officially supported by the software.

MIR images are created using Mini-Image Ripper software. They are used, for instance, when installed game requires CD to run but the CD is for some reason unreadable, and the user has access to CD image has been stored on hard drive. MIR images offer a comfortable solution for reducing space usage on disk. SafeDisk is a type of DRM technology designed to safeguard intellectual property rights. MIR files are sometimes used to crack computer games.