Opening a Unity Project Start Unity. As of version 3.4, by default it will open the sample project “Angry Bots”. You may be greeted with the “Welcome To Unity” Welcome Screen. We won't be needing this, so uncheck “Show at Startup” at its lower- right corner and close that window. We don't want Unity to open a project immediately upon startup, so we change that in the preferences. Go to the preferences window by choosing it from Edit > Preferences...Then check “Show Project Wizard at Startup”.
After checking it, close the Preferences Window. Now, whenever you start Unity, it will open a dialog window to let you choose which project you want opened. Now we'll open the Lesson 1 project. There are two ways to open a Unity project.
Opening a project within Unity From the top menu bar, choose File > Open Project... This will open the Project Wizard Dialog. Choose the “Open Other...” button and locate the Lesson 1 project within your system. Just choose the root folder of the project, not a file within the project. After clicking the OK button, Unity will momentarily close and open your selected project. The next time you open Unity, your recently opened projects will be listed out so you can easily open them.