Use software like WinRAR or 7-Zip to right-click on the part1 file and choose "Extract Here".
Downloading cracked software may expose your system to malware and is illegal in many jurisdictions. Always ensure you have reliable antivirus software running.
You must have all parts of the archive (e.g., part1, part2, ..., partN) in the same folder to extract the content successfully.
"Open.Country-CODEX.part1.rar" refers to the first part of a split RAR archive, typically used to distribute large files, such as a PC game cracked by the scene group CODEX.
Once extracted, the resulting files usually contain an ISO image or a setup folder. You will likely find a setup.exe or equivalent file to install the game.