You will need a utility like WinRAR , 7-Zip , or The Unarchiver to extract the contents.
A file with this naming convention generally contains the following: The main file to run Starsand. Starsand-GOG.rar
The primary advantage of the "GOG" tag is that the game remains yours to keep and play offline indefinitely without digital rights management software interfering. You will need a utility like WinRAR ,
Sometimes GOG releases include digital goodies like wallpapers or manuals. Important Considerations Starsand-GOG.rar