Here is an informative breakdown of the Resident Evil experience on PSP and the technical reality of compressed game files.
Today, you can play every mainline Resident Evil on a modern smartphone via emulation, or on a modded PS Vita with adrenaline. The PSP’s limitations are gone.
: A technical forum where developers post "papers" and tutorials on PSP homebrew and ISO optimization
Even "small size" games can range from 85MB to over 400MB after decompression. Summary of Resident Evil Options Game Title Original Platform PSP Playability Resident Evil 1-3 PlayStation 1 Playable via PSOne Classics or EBOOT.PBP files. Resident Evil 4 No official PSP release; exists as fan-made mods/ISOs. Resident Evil: Revelations 3DS/Consoles Not available for PSP; requires higher-end emulation.