While later "Greatest Hits" versions moved to DVD, the original release was CD-based and is quite small. Top Compression Tools and Formats

A arcade classic that can be compressed to as low as 53MB .

Games that originally came on "Blue Discs" (CD-ROMs) are the best candidates for fitting under the 100MB mark.

Classic shoot-'em-ups that compress efficiently.

These versions have non-essential files—such as high-quality background music (BGM) or full-motion video (FMV) cutscenes—removed to drastically reduce the size. Best PS2 Games Under 100MB (Compressed)

In the emulation scene, "highly compressed" usually refers to one of two methods: