Init(args) can be installed using the Package Manager window inside Unity. You can do so by following these steps:

1. Open the Package Manager window using the menu item Window > Package Management > Package Manager.
2. Select the My Assets view.
3. Search for Init(args) and select it.
4. If you see a Download button, use it to download the latest version of Init(args).
5. Click the Import to project button.
6. Select Import to import Init(args) into your project.

Init(args) is now installed and ready to be used!