Day of the Tentacle (1993) was the first CD-ROM game I played. It was my older brother's copy, from his collection of LucasArts point-and-click adventures. That collection pretty much dominated my childhood gaming.
But subsequently, I hardly touched the genre. There were scarcely any
point-and-clicks to speak of after those golden years. Now, 20+ years on, I'm revisiting DOTT.