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. ❤️ 🫡
All FromSoftware games including most recently AC6. Also Stardew. I’ve beaten Stardew probably more than any other game and there’s a ton of mods that expand the experience.
AC6 was so great, I went directly from NG -> NG+ -> NG++, which I never do. Never wanted it to end.