The file likely refers to a compressed archive of the game Starcom: Unknown Space . If you are looking for a password to extract this specific file, please note that there is no official or universal password for game archives of this type.
Passwords for such files are usually set by the individual or site that uploaded the archive. If you downloaded this from a specific website, you may find the "paper" (password) in the following locations: Starcom.Unknown.Space.rar
If you can tell me or what you're trying to do in the game , I can give you a more specific answer. The file likely refers to a compressed archive