The PS3 hosted the "Golden Era" of Call of Duty. If you are searching for downloads, these are the heavy hitters:
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These files are available on Sony’s official servers for free. They are distributed through third-party forums, file-hosting sites, and torrent networks. The PS3 hosted the "Golden Era" of Call of Duty
Modifying your PS3 voids warranty, permanently marks your console (if ever reverted), and can lead to a PlayStation Network ban if you go online improperly. Call Of Duty Pkg Ps3 Download
The following table highlights the download specifications for popular entries in the series: