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Idle Spiral

Idle System, Inc., Yayu, Sumito.O

This is a beautiful "Idle", "Incremental" game based on spirals and mathematics. Your goal is to make the spiral grow farther and farther from the origin. The game is very simple, but it is very deep and can be enjoyed for a long time!

CasualIndieSimulationStrategyFree To Play

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About This Game

What's Idle Spiral?

This is a beautiful "Idle", "Incremental" game based on spirals and mathematics. Your goal is to make the spiral grow longer and longer. The game is very simple, but it is very deep and can be enjoyed for a long time.

How to play

By buying upgrades, you can grow your spiral more efficiently. There will be a lot of mathematical equations, but don't be afraid. The upgrades themselves are not that strategic and you hardly need to understand this formula. However, as you continue to play, you will gradually come to understand the mechanics.

Layered prestige mechanics

The game has various reset mechanisms called Prestige (as seen in many Idle games!). Prestige resets much of the game's progression, but allow you to progress further and faster than before.

Battle Spiral

In Battle Spiral, your spiral is used as a weapon to fight various designs of spirals; to gain an advantage in Battle Spiral, it is important to consider what rewards to choose and in what order to fight the enemies. An extremely powerful boss with a very complex shape awaits you in the second half of the game!

Challenges

Challenges aim to achieve a specific goal under strong constraints. In challenges you will face debuffs, constraints, and fundamental gameplay changes while trying to achieve a certain goal. After reaching the goal, the challenge is completed and you receive big rewards.

Endless Content

Tornado Prestige is just the beginning of this game. It will take some time to progress through the game, but more content is waiting for you!

Music by AKIYAMA HIROKAZU from H/MIX GALLERY

Community Activity

  1. Idle SpiralSteam patch notes

    v3.0.82

    - Settings is rebuilt as cards. On/off options are switches, the formula font is a dropdown, and frame rate, spiral refresh and currency update tick have their own PERFORMANCE…

  2. Idle SpiralSteam patch notes

    v3.0.76

    - A sixth Hanoi tower, Dynamics: the first tower six layers deep, with a new chain, Attractor Pulse, that strikes its core. - New Hanoi upgrade, Mathematical Induction (T100):…

  3. Idle SpiralSteam patch notes

    v3.0.71

    - Fixed the Challenge menu opening the Battle Spiral instead of the challenge list.

  4. Idle SpiralSteam patch notes

    v3.0.70

    - New raid tower: Dynamics, the sixth Hanoi tower. Clear Topology to unlock it. It is the first tower built six HP layers deep instead of five. - The ×10 buy button now prices…

  5. Idle SpiralSteam patch notes

    v3.0.69

    - Saves that refused to open the game now open: an automation list longer than the build knew about, an unexpected battle item count, a design the build no longer has. Nothing on…

  6. Idle SpiralSteam patch notes

    v3.0.66

    - Fixed four kinds of save that refused to start the game: a battle-item list of an unexpected length, a design this build no longer has, an array left empty beside a filled one,…

  7. Idle SpiralSteam patch notes

    v3.0.61

    - Buying an upgrade no longer resets the spiral. Length is the currency, so a purchase spends it and since v3.0.42 that was being mistaken for the drawn spiral having gone stale,…

  8. Idle SpiralSteam patch notes

    v3.0.45

    - Extended the Tornado unlock progression through T225. - Added exponent upgrades for a–g to the p tab, including the previously inactive T99 upgrade for a. - Added Z-Reactor…

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