File: 9-nine-_episode_1.rar ... -

: Use a tool like 7-Zip or WinRAR to extract the 9-nine-_Episode_1.rar file.

If you are trying to install the 18+ content for the Steam version: File: 9-nine-_Episode_1.rar ...

: You should find two specific files: adult.xp3 and adult.xp3.sig . : Use a tool like 7-Zip or WinRAR