If you have a massive PS3 library and a jailbroken PS4, converting a handful of lightweight classics into PKG files is a fun weekend project. But if you want to play MGS4 natively? Buy a PS3. They are $50 on eBay.
Even if a developer spent months porting a PS3 game to PS4 (like The Last of Us or God of War III remasters), it’s a , not a converter. For indie devs: impossible without source code. ps3 to ps4 pkg
If your goal is to play PS3 titles on your PS4 hardware, you must use one of Sony's official workarounds: PlayStation Plus Premium If you have a massive PS3 library and
) to allow the execution of unsigned code. Users then boot a specialized version of Linux, such as Gentoo Linux (often called "Gentle Linux"), from a USB drive. The RPCS3 Bridge : Once inside Linux, the RPCS3 emulator They are $50 on eBay