For the uninitiated, Rocksmith (specifically Rocksmith 2014 and the Rocksmith+ ecosystem) is the gold standard for learning electric guitar through a "rhythm game" interface. But for the dedicated fan base, the official DLC (Downloadable Content) was only the beginning.
You cannot buy these. You can only earn access by being active on the forums or donating time (not money) to the community. rocksmith cdlc exclusive