For me it was Terraria, Satisfactory, Tetris Effect Master Mode, Minecraft with Mekanism mod & CSGO / CS2 (almost 2000 hours in CS alone).
Edit: There are so many answers that I might only reply if I have something interesting to say. I will read all of your answers though. 🙂
Edit 2: It has become too much for me and I have to disable notifications. Thank you for the massive response and please continue to discuss with everyone here. ❤️ 🫡
I wasted some 2-3 years of my life in CSGO too when I was younger. All my free time, down the drain basically. It wasn’t even fun after a while, just a hard, tiring grind. Attempted to compete on semi-pro level, somehow got it to my head that it was possible. Did compete ultimately, but none of my teams made it. Never got anywhere and the day I finally got off it was the best day of my adult life. It was bad.
I feel ashamed to admit this out loud. It’s just so cringeworthy. But it does some good to keep my head level and remember the shortcomings of my younger days.
Nowadays the closest I get to “addiction” level is bingeing a few months worth of evenings on the likes of Crusader Kings 3, M&B Bannerlord, Stellaris or Rimworld. Much more sane since it’s not as intensive, it can be paused at any moment, and ultimately there’s an end to it, so it just naturally withers away from my days eventually.