Steam Game Backup Information File
What is a .SIS file?
Information file used by Steam, a gaming service that allows users to download and manage Valve games; contains plain text markups, which describe properties of a game backup; used in the process of restoring game backups.
More .SIS File Extension Information
SIS files are backed up with a .SIM file and one or more .SID data files.
How to open .SIS files?
.SIS can be using by 1 Flatform (Windows).
And can be open by bellow programs list:
Updated at: 2018-11-13