Backwards Compatibility - PlayStation 4 Guide - IGN

It has been officially confirmed that the PlayStation 4 will not support PlayStation 3 games natively. This means that any retail (i.e. disc-based) or

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Backwards Compatibility - PlayStation 5 Guide - IGN

Ubisoft removes claim that PS5 backwards compatibility won't be

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PlayStation's Long, Complicated History with Backward

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Backwards Compatibility - PS4 Developer wiki