Any Paradox game. Oxygen Not Included. Factorio. Civilization. Rimworld. Dwarf Fortress. The list goes on.
For me I think it's about having non-stop and parallel mini problems/puzzles/goals. By the time one task is finished. There's two more to take its place.
Aspartame has about the same amount of calories as sugar (4kcal per gram). But it's much more sweet so you need very little of it. So there is a very tiny amount of sweetener which does contain calories but it's rounded down to 0.