A simple Scene with a 1st person camera and controller, a Terrain, and a Skybox to get things started.

Note: Never, EVER, commit the Library folder. Only the Assets and Project Settings folders. The Library folder is meta data that is generated when Unity compiles to make future builds faster. Hence, your first time building the project when you first open a project will take a while. (Could take hours if the project is large and your computer is slow)