To play on a PSP, you typically need to convert the original PlayStation 1 (PSX) version into an EBOOT.PBP file , as there was never a native Resident Evil game released specifically for the PSP. Users often seek "highly compressed" versions to save space on older memory sticks, reducing the file size to roughly 260–300 MB . Setup Guide for PSP

To play the original Resident Evil 3 on a modified PSP, you generally have two options:

“Eli,” he rasped. “My sister—locked upstairs.” Words came like broken glass; he showed her a stairwell map, a scribble indicating a nursery on the seventh floor. She’d seen what “locked upstairs” could mean: people barricaded from the infected, sometimes waiting for rescue that never came, sometimes waiting to be left behind.