Comment by a-dub

the classic was dragon's lair: https://en.wikipedia.org/wiki/Dragon%27s_Lair_(1983_video_ga...

laserdiscs were a weird 70s/80s analog optical video disc technology where many players had a db-9 (edit: just looked these up, apparently they had a db-25 connector) serial port for a serial control protocol. dragon's lair was a classic stand up video game cabinet with a laserdisc player and a simple control system that created a "choose your own adventure" interface for the video content.

some of the first computer programs i ever wrote were atari st programs for controlling a laserdisc player. (we had one in elementary school)