It sounds like you’re asking about the RAP file for Call of Duty: Black Ops 2 – likely in the context of RPCS3, the PlayStation 3 emulator.
In the context of Black Ops 2 (specifically for the PS3), a is a license or "rights" file required to unlock digital content like the game itself or its DLCs (maps, camos, etc.). How to Use a .rap File for Black Ops 2 black ops 2 rap file
The era of the trickshot may be over, but the beat never stops. Keep your sensitivity high, your sniper steady, and your rap file loud. It sounds like you’re asking about the RAP
The .rap file is the license key required to decrypt and play digital games (PKG files). USB Location : Create a folder named (all lowercase) on the root of a FAT32 formatted USB drive. Place your .rap file inside this folder. Internal HDD Location : Alternatively, you can move the .rap file directly to /dev_hdd0/exdata on your PS3's internal hard drive using a file manager like Activation your sniper steady