Sony is being sued for changes to its terms and conditions designed to prevent users from suing it en masse.
The class action lawsuit, filed in California, claims the changes force users to give up their legal rights and are unfair.
Sony said that it was legally entitled to make such changes to its terms.
The legal case will be watched keenly by other firms, including Microsoft, which has also introduced so-called no-sue clauses in recent months.
A Sony spokesman told the BBC: "We chose to make the changes after the Supreme Court clarified the law."
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