If your download ends in .zip , .rar , or .7z , you need to extract it using ZArchiver. Extract until you see a file ending in .iso or .cso . A file is already the .cso —do not extract that further.
: These require a different emulator altogether (like AetherSX2 or DamonPS2), as PPSSPP cannot play PlayStation 2 games. Official Resident Evil 4 Availability If your download ends in
: You must provide your own legally dumped game ISO from a physical GameCube, Wii, or PS2 disc. Extract the File If your download ends in .zip