If you're looking for a wider variety, you can often find high compressed games under 50/100 MB through community-shared lists on Quora. Users on Reddit also maintain active threads for PSP ISO/EBOOT games under 50MB, which include homebrew and "minis" that are naturally small. Quick Setup Guide
(~36 MB): A direct sequel to the first console game, fully playable on mobile emulators. Spider-Man 3 50 mb highly compressed ppsspp games repack
Zipping a 300MB ISO to 280MB isn't impressive. But using via tools like Ciso.PSP or YACC (Yet Another CSO Compressor) allows you to compress your own ISOs down to 60-70% of the original size. You can turn a 200MB game into 130MB safely. If you're looking for a wider variety, you
Music and textures may be re-encoded into lower-quality, lossy formats (e.g., lower bitrates) to save space. Spider-Man 3 Zipping a 300MB ISO to 280MB isn't impressive