There is no official version of Call of Duty: Modern Warfare 2

Launch & Play

: Open the PPSSPP app, navigate to the folder where you saved the ISO, and tap the game icon to start playing. Best Settings for No Lag

Any files labeled as "highly compressed MW2 ISOs" for PPSSPP are typically modded versions Roads to Victory or other mobile shooters (like Modern Combat ) that have been reskinned to look like Modern Warfare 2. The Only Official PSP Call of Duty Game Title Call of Duty: Roads to Victory Original Size : ~400MB to 500MB (uncompressed). : Native PSP (fully compatible with PPSSPP). Safe Sources

Then, he saw it. A forum post from 2013, buried under layers of defunct gaming threads.

Disclaimer: Downloading copyrighted ISOs is legally gray. Only proceed if you own a physical copy of the game or live in a region where abandonware is accepted. We do not condone piracy.