You will need a file archiver tool, such as:
The official software for creating/extracting .rar files. 7-Zip: A free, open-source alternative. RAD-CODEX.part1.rar
Since large files are often broken into smaller, more manageable pieces for uploading and downloading, ".part1.rar" indicates this is the first file of a multi-part set (e.g., part1, part2, part3) [2]. You will need a file archiver tool, such
Always scan extracted files with up-to-date antivirus software before running any installers. RAD-CODEX.part1.rar
To use the content within this file, you must have all subsequent parts (part2, part3, etc.) located in the same folder.
Ensure you have the entire set, including RAD-CODEX.part1.rar , RAD-CODEX.part2.rar , etc. [2].
A well-known scene group that releases cracked software or games [3]. How to Open/Extract "RAD-CODEX.part1.rar"