A CHD file is a lossless, compressed, chunk-based image of a hard drive, CD-ROM, or Laserdisc. You cannot run these games with just the ROM .zip file. You need the ROM (for the motherboard/BIOS) AND the CHD (for the storage media).
Have a "hot" CHD tip we missed? Check the forums, but remember to keep your antivirus active—the hotter the file, the sketchier the source. mame chds hot, MAME CHD setup, large arcade CHDs, Killer Instinct CHD, NFL Blitz CHD, Gauntlet Legends CHD, CHD folder structure, MAME troubleshooting.
Games like Cruis'n USA , Killer Instinct , and Dance Dance Revolution didn't just use small chips. They used large hard drives, CD-ROMs, LaserDiscs, and GD-ROMs. Dumping those physical disks into a single .zip file was inefficient and technically messy.
Unlike 40-year-old Pac-Man ROMs, many CHD games (like Gauntlet Legends , Blitz , and DDR ) are from the late 1990s and early 2000s. Midway (Warner Bros.), Konami, and Nintendo still hold rights to these properties.
When you search for you are looking for the bleeding edge of data preservation. The "hotness" is driven by the fact that many official arcade boards have died (capacitors leak, hard drives crash). The only way to play NFL Blitz exactly as you remember is via a MAME CHD.
