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. ❤️ 🫡
The Cluefinder series, Minecraft beta from 1.4 to 1.6, BOTS, Secret of the Solstice, Realm of the Mad God, Skyrim, Mindustry, FTL, and currently CS2 and PokeRogue. Though I’m sure I’m forgetting at least one.