Sony startede som bekendt helt forfra med hardware-sammensætningen, da de i sin tid begyndte at designe PlayStation 4, og derfor har ligheder med PlayStation 3 ikke været mange, hvilket naturligvis har gjort konverteringer af spil fra PS3 til PS4 problematiske.
Alt det udtrykker Naughty Dogs Neil Druckmann en stor enighed omkring i et nyt interview med Edge, hvorfra det lyder at opgaven med at konvertere The Last of Us var lidt af en tur gennem helvede:
"We expected it to be hell, and it was hell. Just getting an image onscreen, even an inferior one with the shadows broken, lighting broken and with it crashing every 30 seconds ... that took a long time. These engineers are some of the best in the industry and they optimized the game so much for the PS3's SPUs specifically. It was optimized on a binary level, but after shifting those things over, you have to go back to the high level, make sure the systems are intact, and optimize it again."
"I can't describe how difficult a task that is. And once it's running well, you're running the [versions] side by side to make sure you didn't screw something up in the process, like physics being slightly off, which throws the game off, or lighting being shifted and all of a sudden it's a drastically different look. That's not ‘improved' any more; that's different. We want to stay faithful while being better."