From PS2 to PS3 and onto PS4.
PS4 Backwards Compatibility: Can You Play PS1, PS2, and PS3 Games on PS4?
Why isn't the Playstation 4 Backwards Compatible? : r/gaming
Is PS4 backwards compatible with PS3 games? - Quora
Is the PS4 backwards compatible with PS3 and PS2 games? - Quora
How to Play PS3 Games on the PS4 (with Pictures) - wikiHow
It's Time to Bring Real Backwards Compatibility to the PS4
Is PS4 backwards compatible with PS3 games? - Quora
PS5 backwards compatibility list: Which PS4 games will be backwards compatible with PlayStation 5?
SONY PlayStation 3 Metal Gear Solid 4 Bundle 80GB Console Backward Compatible 840356941868
Is PS4 Backwards Compatible? [No, But Here's How To Play Classic PlayStation Games] - TechShout
Can You Play PS3 Games on a PS4?