best idle game, takes some time to finish. started nov 2023 and got 100% in dec 2025.

Recommended (Idle, But Somehow Addictive)

Honestly, one of the better idle games out there — if you’re into that sort of thing. The start can feel a bit slow, and later on it can get repetitive once you unlock most upgrades, but that’s kind of the point of idle games: slowly building toward better, faster automation while you… mostly watch numbers go up.

Customization is a nice touch. Skins and hats let you deck out your ninja however you like — because nothing says “ultimate idle experience” like a fashion-forward ninja.

If you’re chasing 100% achievements, good luck. It takes a ton of patience and probably a few hours of “just let it run in the background” therapy. But hey, that’s also part of the charm.

If you like idle games, this one won’t disappoint. If you don’t… well, it might still surprise you. Either way, it’s cheap, low-pressure, and oddly satisfying.
-SR

Mathematics