PS2 Backwards Compatibility On The PS4 Might Not Involve Discs | Ubergizmo
PlayStation 5 backwards compatibility for PS1, PS2, and PS3 games could be provided by a revamped PS Now service with upscaling capabilities - NotebookCheck.net News
Sony: PS2 Games Coming To PS4 Is Not Exactly Backwards Compatibility | Attack of the Fanboy
Hackers Just Made The PS4 Compatible With PS2 Games - YouTube