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 think most here are too generous with the term addiction.
I had to uninstall Hearthstone years ago, because I compulsively played it multiple hours every single day, despite not really having fun playing it anymore. It was either grinding to get cards or tilting on ladder. That’s what I would call an addiction.
Edit: After Hearthstone I played a lot of Slay the Spire and after that Marvel Snap. Never more then I enjoyed it, so I wouldn’t count those.
I got a couple hundred dollars deep into hearthstone, but luckily they came out with cubelock and I lost all interest after having to fight that stupid deck over and over.
I loved that deck! Sorry, but I guess in the end I might have helped you escape.