"Highly compressed" usually refers to game files shrunken using high-ratio compression algorithms (like KGB or 7z) with the promise of downloading a game that is usually 10GB+ in a file under 100MB.

; it was a console-exclusive title for the PlayStation 3 and Xbox 360. Any "highly compressed PC game" files found online are likely unofficial, potentially unsafe, or configured with an emulator like RPCS3 to run the original console version on Windows. The Story of SoulCalibur V

: Legitimate ways to play on PC involve using emulators like (for PS3) or