Nin Online 1.8.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
Commonly, this program's installer has the following filenames: Client.exe, Launcher.exe, Nin Online Launcher.exe and Update.exe etc. We recommend checking the downloaded files with any free antivirus. The following versions: 1.8, 1.4 and 1.0 are the most frequently downloaded ones by the program users. This free software is an intellectual property of NinOnline. Nin Online belongs to Games.
From the developer:
Nin Online is a 2D free-to-play MMORPG where you play as a ninja in a world inspired by the Naruto series. The players can play their way through the ranks and shoot for character goals or they can simply enjoy the excitement of the story and lairs with their friends.
You may want to check out more software, such as DriveHQ Online Backup, Online TV Player or 3D Online Pool, which might be related to Nin Online.
Reference
Personal Security