Games like Dragon's Lair , Space Ace , and Time Traveler used Laserdiscs that rot and die. The "hottest" project right now is the "Domesday Duplicator" project, which is capturing raw RF signals from these discs to create perfect, uncompressed CHD files. Expect the file sizes to jump from 500MB to 10GB per game.

Because a ROM alone can't deliver that laser disc FMV intro . It can't stream the hard drive samples from a 90s fighter. CHDs give you the complete cabinet experience — load screens, attract modes, and all.

Unlike standard ROMs, which are dumps of tiny silicon chips, CHDs are massive files containing the data from . They are essential for running the cinematic and high-fidelity titles of the mid-to-late 90s and early 2000s, such as: