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. ๐
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. โค๏ธ ๐ซก
well said! I should check out Enshrouded. I just bought Factorio after finally learning it never goes on sale, lol. and then immediately got lost in two other gangs, now doing a fourth Stardew Valley playthru
also fyi there's no hyperfocus type of ADHD; that's just a broad effect of executive dysfunction