It sounds like you're referring to the version of Grand Theft Auto: San Andreas , which became popular years ago for fitting on a single CD or for slower internet connections. However, it's important to clarify that the full, legitimate PC version of GTA San Andreas is around 4–5 GB when installed. The 700 MB versions you see online are heavily stripped-down pirated rips — they usually remove radio stations, cutscenes, textures, voice lines, vehicles, or map details to shrink the size.