If you are looking for the official version rather than a specific archive file, it is available on major platforms:
: It introduces two new environmental abilities, Shape and Fracture , which allow you to manipulate the crystalline formations within the caves to create platforms or destroy obstacles. File: Control.Incl.Foundation.DLC.zip ...
To access this content in-game, you must have completed the main story mission . Once finished, Jesse will receive a notification to visit the Maintenance Sector to begin the mission " The Foundation ." Official Purchase Options If you are looking for the official version