Slay the Spire
There are a bunch of games that I'll get super into, play for a while, then be finished with.
Slay the Spire taps perfectly into every compulsive center of my brain to make me keep playing. Like, we talk about 'addictive' games usually just as ones you like a lot... this is the first time I started to see it closer to actual addictive (though not actually a serious thing for me). It's such a sweetspot for my habits, I feel like I'd just keep saying 'one more run' so consistently, hours, days would evaporate. It kept me busy, to the detriment of doing other things.
You get on a good run, better keep going. You lose a run, might as well just start a new one and see if you have good opening luck. There's rarely a point that feels like "I should stop", until some IRL obligation comes up.
I still go back to it often when I just want an enjoyable way to kill time, or do something while I watch videos/tv on the side.
Other games with roguelike elements tap into this feeling too, like Balatro, Vampire Surviors, or Hades. But STS is where it felt strongest to me.
Another answer for me is Super Smash Bros. Melee (but could probably apply to many multiplayer games).
Normally I'd always engaged with it in person, at events. But when I started playing online, it was almost too much of a good thing.
On the Internet, your next match is always 15 seconds away. You get beat, you go 'I can do better, just give me another chance'. You win, you're on a high, you don't ever want to stop.
The game has that perfect push and pull (at least when you're playing someone anywhere near your level) that just builds compulsion. You're constantly engaged in decision making or quick button pressing each moment, and it just feels satisfying.