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. 🙂
My latest addiction was Peripeteia but I beat it in about 40 hours so the high was short lived. I really fuckin loved that game and looking forward to additions as it moves through early access.