Tutorial
From Sphere Wiki
Welcome to the Sphere tutorial. It will uide you through your very first steps in Sphere.
Installation
First, as always, goes the installation. Download the actual sphere release here:
Then, unzip sphere-binaries.zip to your new sphere directory. Extract all files in sphere-dlls.zip there, too.
Open your sphere directory. You should see two .exe files: editor.exe and engine.exe Now start editor.exe. You should see a gray screen with a menubar at the top and a status bar at the bottom.
Congrulations! You have succesfully installed Sphere and started the development environment.