Sony has made it official that it won't be implementing any sort of DRM in the PlayStation 4 to stop the use of used-games The confirmation comes in the form of Sony retroactively having answered the question of used-game DRM. Kotaku had decided to contact Sony directly about the question, and the Sony representative pointed Kotaku towards a statement made by Sony studio chief Shuhei Yoshida back in February.
According to Yoshida, "At a roundtable this morning, Sony's game studios chief, Shuhei Yoshida, told reporters that any requirement for users to register a game online in order to play it would be left to game publishers. Sony won't require that."