There are two primary ways PS3 games are compressed:

Remove foreign language audio tracks and video files if you only intend to play the game in English. 2. Converting to ISO with PS3ISOTools

When installing a PKG, you need twice the space (once for the package file, once for the installed game), though you can delete the PKG file after.

Shrunk files retain 100% of their original data. When the system extracts the game, it returns to its exact original state. Performance and graphics remain identical to the retail disc.

: Features high-fidelity pre-rendered scenes that remain sharp even when assets are efficiently packed. Mirror's Edge

Tools like rom-organizer from GitHub provide automated compression workflows: rom-organizer compress <source> [flags] compresses PS3 decrypted ISOs and PKG files into 7z archives with organized folder structures.

Surprisingly, the highly compressed PKG/ISO files can actually lead to faster load times

If your goal is to reduce file size while keeping the game functional, use these tools to remove unnecessary "padding" data from the game image:

The user query implies that "highly compressed" might be "better." The report analyzes this claim across three metrics:

The pursuit of highly compressed PS3 games carries significant downsides that outweigh the bandwidth benefits.

With large titles like Heavy Rain reaching up to 22.9 GB, using compressed formats allows users to fit three or four times more games on a single external hard drive. This is crucial for building a massive library. 2. Faster Transfers and Downloads

Transferring a 40GB game over USB 2.0 to a PS3 takes forever. A highly compressed game (reduced to, say, 15GB) cuts that time in half, or better. If you have a slow external hard drive, this is a massive time-saver. B. Efficient Storage Management

Many PS3 games include multi-gigabyte video files for foreign languages you will never use.

A highly compressed file (e.g., a .7z file) cannot be played directly by the PS3. It must be (decompressed) back to its full size before it can be loaded into a backup manager like MultiMAN or WebMAN.

The definitive software for managing PS3 ISO files. It allows you to convert folder games to ISO, split files for FAT32 compatibility, and automatically modify or optimize the filesystem to reduce unnecessary padding. PS3 Game Updater

: Use PS3 ISO Rebuilder to convert game folders into decrypted ISOs. This removes "padding" (null data) from the original disc image, significantly reducing size without losing game quality.

: In the PS3 menu, go to Game Settings > PS - Smoothing to reduce jagged edges on older titles.