Simply put: If you install a PKG (package) file of a game but do not place the corresponding RAP file in the correct folder on your PS3, the game will either ask for a license, show a "trial expired" message, or fail to boot entirely.
The Rap PS3 file is a digital license key required to activate PlayStation 3 content. These small files act as a "handshake" between your console and the software, proving to the system that the content is authorized to run. Without a matching RAP file, most digital games or downloadable content (DLC) will display a licensing error, preventing the game from booting. Rap Ps3 File
files are console-specific and cannot be used on other systems. RPCS3 Compatibility : For PC emulation using files are mandatory to run dumped digital games and DLC. How to Use .RAP Files Simply put: If you install a PKG (package)