: Retains the iconic over-the-shoulder camera and survival horror gameplay.
The PSP never received an official Resident Evil 4 port (Capcom opted to release the Resident Evil 1/2/3 remasters for PSP/PS Vita instead). , the PSP can play PlayStation 1 classics via eboots, and more importantly, the 200MB version you find online is typically a heavily compressed PS1 rip or a custom PSP conversion of the PS2 assets.
: Files matching this description are typically "ISO" or "CSO" mods that use another PSP game's engine (such as Syphon Filter Free Running