In PSP homebrew circles, “highly compressed” means:
Resident Evil 4 remains a timeless classic. With the right highly compressed, better-optimized file, your PSP becomes the ultimate survival-horror machine. Now, go save Ashley—and don’t forget to buy the Striker shotgun. resident evil 4 psp highly compressed better
Search for Resident Evil 4 [PS2toPSP] [v2.5] [HQ Audio] [Compressed] . Ignore versions older than v2.0. The best release groups for this specific title are "Ripownz" and "PSPGoesWild." The file name should look like this: Resident_Evil_4_[Better_RIP]_[300MB].7z In PSP homebrew circles