LaserDisc hardware games
From Sega Retro
LaserDisc hardware games are arcade games that, rather than rely on more primitive hardware such as ROM cartridges or floppy disks, rely on the short-lived optical laserdisc format, a precursor to the compact disc. When laserdisc first became an option for video games, many arcade developers latched on to the idea, including Sega. LaserDisc could offer very detailed, high quality backgrounds that did not rely on drawing pixel-based tiles onto a screen, though would often struggle to give the player a lot of gameplay value, as background videos could not easily be manipulated or controlled. Sega released a few laserdisc games, but ultimately dropped the format in 1984, most likely for the same reasons it failed to take off in the home market.