The campaign has been fully completed, all characters have been unlocked (including DLC characters), all instruments have been maxed out, and the highest rank of "Virtuoso 204" has been achieved. All challenges have also been completed with 5 stars.
How to download?
Install the file.
Go to C:\Users\"Username"\Documents\Teardown
Move the file to the folder, and if prompted, use the replace option.
Author: Mr_Kruty