I have a project with several scenes, which I am exporting each of them out as a single standalone player. Building them manually proves to be time consuming. Is there anyway I can build the scenes from a command-line, or batch build them?
If you have a Pro license, you can use BuildPipeline.BuildPlayer:
http://unity3d.com/support/documentation/ScriptReference/BuildPipeline.BuildPlayer.html
And you can also execute scripts from the command line:
http://unity3d.com/support/documentation/Manual/Command%20Line%20Arguments.html
Add all the scenes into the build settings, you'll have to create a menu so you can load each scene when you want using `Application.LoadLevel(levelname)` .