SP Soccer is typical Joomla 3.4+ extenstion which can be installed from back-end. It can be inslaled on online website as much as on localhost.
Note! If you're using Soccer quickstart you do not have to install that extenstion, it's included inside package.

1. Download the extension to your computer/tablet as a zip file package.
2. From the backend of your Joomla site (administration) select Extensions -> Install/Uninstall.
3. Click the Browse button and select the extension package on your harddrive/memory.
4. Click the Upload File & Install button.