Backwards Compatibility - PlayStation 5 Guide - IGN

In a reveal with Wired [1], PS5 Lead Architect Mark Cerny confirmed that the PlayStation 5 would have Backwards Compatibility with all PlayStation 4

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Xbox Series X Controller - Xbox Series X Guide - IGN

PS5 backwards compatibility guide: PS1, PS2, PS3, PS4, and more

PS5: 'Majority of the 4,000+ PS4 Titles' Will be Backwards Compatible, Sony Says - IGN

PS5 Won't Be Backwards Compatible With PS3, PS2, or PS1 Games - IGN

Sony Patent Suggests PS1, PS2, and PS3 Could Be Backwards Compatible Via the Cloud - IGN

List of PlayStation 5 Launch Games - PlayStation 5 Guide - IGN

PlayStation 5 vs. Xbox Series S/X: A buying guide to help you decide.

Xbox One may support original Xbox through backwards compatibility