In its E3 2013 Media Briefing, Sony announced that the PlayStation 4 will support used games. Additionally, the system won't require any sort of online authentication for disc-based games.

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Sony also announced that trading, lending and selling of games will be permitted, and purchasing a game means that it is owned by the consumer forever.Also...

Rich is an Executive Editor at IGN. When he was in high school and college, he’d basically stop everything to watch the annual conferences and coverage. Expect plenty of game coverage and interviews from Rich throughout the week – chat with him about them on Twitter @RichIGN.