Once your .rap license is active, you unlock arguably the greatest hip-hop soundtrack in video game history. Activating the .rap gives you the full rights to hear:

A RAP file is essentially a for PlayStation 3 content. While the game's actual data is stored in a PKG (Package) file, the RAP file contains the necessary signature or "handshake" required to decrypt and run that content.

A for GTA: San Andreas on PS3 is a digital license key required to activate the game's .PKG (installation) file. Without this file, the game will usually display an "Expired Copyright" or "Renew License" error when you try to launch it on a console with custom firmware (CFW) or PS3HEN. 🔑 What is a RAP File? Function : It acts as the "key" to unlock digital content.