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There are specific games, such as Journey , Flower , Flow , and a select few others, that received official "Cross-Buy" or digital upgrade ports on the PS4. Developers for these games essentially built a PS4 version of the game.
Many classic PS3 games have been officially ported to PS4: The Last of Us Remastered , Uncharted: Nathan Drake Collection , God of War III Remastered . Sony did not use a converter – they used source code access and full recompilation with their internal PS4 SDK. That is the only reliable method. ps3 to ps4 pkg converter
The PS4 moved to a standard PC-like architecture (AMD Jaguar). There are specific games, such as Journey ,
PS3 games are written for PowerPC-based Cell processors, while PS4 games are written for x86-based processors (similar to modern PCs). Sony did not use a converter – they
While PS3-to-PS4 conversion is a myth for 99% of games, the reverse scenario (PS2-to-PS4) is a thriving reality.