You're looking for information on downloading Call of Duty on the PS3. Here are some details:
However, I must advise that . PS3 games, including Call of Duty titles, are available for purchase on the PlayStation Store (PS Store) or in physical copies at retail stores. Call Of Duty Pkg Ps3 Download
A PKG file is a package file used by the PlayStation 3 to install games and other content. If you're looking to download Call of Duty on PS3, you might be searching for a PKG file. You're looking for information on downloading Call of