: When Windows asks if you want to overwrite or replace existing files, select Yes for all. 3. Essential Post-Installation Patches

: You must already have the base game ( Koikatsu Party ) installed on your PC. 2. Extraction & Installation Steps

: Right-click on part1.rar . The extraction software will automatically detect and pull data from part2 and part3 to complete the full file reconstruction.

Highlight all files and folders inside the extracted setup folder.

: You must have part1.rar , part2.rar , and part3.rar in the same directory.

: Choose "Extract here" or "Extract to..." to get the expansion files.