The search for "PS3 ISO compress size reduce tool" found a GitHub repository with tools for organizing and optimizing PS3 ROMs, including compression into 7z archives. It also mentioned "Gnarly Repacks" for better compression. The "PS3 ISO TOOLS" software can also be used. This is useful for the compression methods section.
The compression method you choose is also limited by your emulator's capabilities. Here's the current compatibility status for the two most popular PS3 emulators: ps3 iso games highly compressed best
: One of the greatest action-horror games ever made, sized at Burnout Paradise : Fast-paced racing in an open world for only Far Cry 3: Blood Dragon : An 80s-inspired action explosion at Where to Find PS3 ISOs and ROMs The search for "PS3 ISO compress size reduce
PlayStation 3 (PS3) gaming remains highly popular today. However, standard PS3 game files are massive. A single game often requires 20GB to 50GB of storage space. This creates major challenges for players with limited bandwidth or small hard drives. Highly compressed PS3 ISO games solve this exact problem by drastically reducing file sizes without sacrificing core gameplay content. Understanding PS3 ISO Compression This is useful for the compression methods section