It typically uses the LZMA (Lempel-Ziv-Markov chain algorithm) method, which offers a significantly higher compression ratio than standard ZIP files.
Use apps such as 7Z: Zip 7Zip Rar File Manager on Android. Context for "MM_13"
These files can be secured with strong AES-256 encryption.
Often used for "Mighty Master," "Mega Mod," or "Magic Mod" versions.
A file with the name "" is a compressed archive created using the 7-Zip software. The ".7z" extension indicates it is a container for one or more files that have been reduced in size to save storage space or facilitate faster sharing. Technical Overview of 7z Files