Years ago, users ripped games to .BIN/.CUE files. A 700 MB game would stay 700 MB. Compressing them to a .7z archive would shrink it to 200–300 MB for download, but you had to extract it back to 700 MB to play. That wasted SSD space.
Certain games compress better than others due to their file structures.
Some "highly compressed" packs are actually "Trainer" packs that crash 3 hours in. Solution: Check the file size. If Final Fantasy VII is smaller than 300 MB, it is likely a broken rip. Stick to Redump verified CHD sets.
If you want, I can expand this into a full-length academic-style paper (with literature citations, methodology, measured compression ratios across a sample of titles, and appendices with command-line examples). psx games highly compressed
Highly compressed PSX (PlayStation 1) games, often referred to as "rips" or "highly compressed ISOs," are game files that have been significantly reduced in size for easier storage or faster downloading. This process generally falls into two categories: lossless compression lossy stripping Common Compression Formats CHD (Compressed Hunks of Data):
A popular lossless format that preserves all original data while reducing file size by approximately 20–40%. It is widely supported by modern emulators like PBP (EBOOT):
Originally used for playing PS1 games on the PSP. This format can combine multi-disc games into a single file and offers decent compression, though it is considered "lossy" because you cannot easily revert it back to a standard BIN/CUE format. ECM (Error Code Modeller): Years ago, users ripped games to
A format that strips out error-correction data from a CD image to save space. These files must be "un-ecm'd" before they can be played in most emulators. The "Ultra-Compressed" Method (Stripping)
When you see a 500MB game compressed down to 5MB, it usually isn't just clever coding—it’s content removal FMV (Full Motion Video) Removal:
Developers often replace large cinematic files with tiny "dummy" files. This can shrink a game like Final Fantasy VII significantly, but you lose all the story cutscenes. Audio Ripping: That wasted SSD space
Background music (BGM) and voice lines are often removed or heavily downsampled, leaving the game silent or with low-quality audio. Zero-Padding Removal: Some tools like
tools remove the "junk" data or padding used to fill up the physical space on a CD-ROM. Pros and Cons Lossless (CHD/PBP) Highly Compressed (Rips) Size Reduction Game Quality Identical to original No music, no movies, possible bugs Ease of Use Plug-and-play in most emulators Often requires extraction/installation Generally safe High risk of malware in "1MB" downloads Important Note: Extreme compression (e.g.,
in 10MB) is frequently used as a lure for malware or phishing sites. If a file size seems too good to be true, it likely is. convert your own PS1 library into the more efficient CHD format? The Ultimate ROM File Compression Guide - Retro Game Corps 6 Feb 2023 —