the NFR games have Not for Resale in the lower right hand corner of the back where you would normally find a UPC. These are the games youll find with this variation...

NBA 2K
NFL 2K
World Series Baseball 2K1
NBA 2K1
NFL 2K1
Sonic Adventure (this version has a bonus Sonic Adventure 2 Demo in a double jewel case)
Sonic Shuffle
Sega Smash Pack