The original game requires a higher firmware SDK (e.g., 9.00). A fixed PKG backports the executable to run on jailbroken firmwares like 5.05 or 6.72 by patching the sceKernelLoadStartModule calls.
The most popular "fix" is the unofficial 60fps patch developed by Lance McDonald . This mod adjusts over 100 timing variables to unlock the frame rate while maintaining correct game speed. bloodborne pkg fixed
The original game files are unpacked, the patch is applied to the executable ( eboot.bin ), and the files are repacked into a "fake PKG" (fPKG). The original game requires a higher firmware SDK (e