The default settings work, but for an optimal experience on a modern phone or PC, tweak these options:
However, if you do not own the game legally, please consider buying the $15 official mobile port or the $20 Steam version (which includes all DLC). Piracy hurts small developers, and in the case of Capcom, you risk legal notices, malware, and poor emulation performance from broken zip files. Resident Evil 4 Ppsspp Zip File Download
The original 2005 version is officially available on PC (Steam), PlayStation 4, Xbox One, and Nintendo Switch. The Ground-Up Remake: The default settings work, but for an optimal