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. ❤️ 🫡
Definitely animal well. When I played it out was the coolest sense of discovery that I had ever felt playing a game, and it kept going for so long. I would play it whenever I had a spare minute, especially if I had an idea for a puzzle. I’m not great at normal puzzle games, my brain just doesn’t work like that, but I love exploration and easy puzzles and animal well really scratched that itch for me in a way no other game has.
Aside from that, I wouldn’t be surprised if I had like 10,000 hours in Minecraft, since that’s pretty much the only video game I like to play, and I’ve been playing it for almost ten years. Not an addiction though, I only play when I have the time and the desire.