Highly compressed PS1 games are digital copies (ROMs or ISOs) that have been optimized using advanced algorithms to reduce their footprint. While a standard PS1 disc image usually comes in and .CUE formats, compressed versions use specialized extensions like .CHD or .PBP . iso, bin/cue or pbp?

Downloading "highly compressed" PS1 games is a popular way to revisit classics like Metal Gear Solid or Tekken 3 without filling up your storage. Using specialized file formats, games that originally took up 700MB can often be shrunk significantly.