It is roughly that simple. You'll have to do OS-specific stuff for things like metadata, icons, any alternate control methods (mouse/keyboard vs touch), etc, bu

It is roughly that simple. You'll have to do OS-specific stuff for things like metadata, icons, any alternate control methods (mouse/keyboard vs touch), etc, but in my limited trials I've never had to do any platform-specific stuff that wasn't 100% justified. This is one of Unity's most important and valuable features, IMO.