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iO

iO is an abstract physics platformer about size and speed. Grow bigger and smaller in order to solve some of the trickiest puzzles. Reach the exit as quickly as possible and grab a gold medal as your reward!

Developer
Gamious
Publisher
Gamious
Release
December 5, 2014
11 years and 289 days ago
Steam Reviews
Very Positive235 reviews80.9%
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Game contextLatest: IGF Team
ContextThe evidence factors used to assess whether this game belongs on IndieGame.Fan.Status
Notes
Latest Contributor: IGF TeamEdit notes
Updated: Jul 13, 2026Developer scaleThe operating scale of the game's developer.
Updated: Jul 16, 2026Publisher scaleThe operating scale of the game's publisher.
Updated: Jul 16, 2026Publisher statusHow the game's publishing relationship is classified.
Search Google: How is iO and Gamious funded?FundingThe known source of funding behind the game.
Search Google: Who controls the creative direction and IP for iO and Gamious?Creative controlWho appears to retain creative control of the game.
Updated: Jul 16, 2026Release statusWhether and how the game has been released.

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About the Game

iO is a physics platformer in which you control a ball. By growing or shrinking the ball you can influence its speed and weight. Use these mechanics to gain momentum and make your way through the levels. Toy with the laws of physics, solve the puzzles and reach the exit as quickly as possible. Can you win the gold medal in all levels?

Features:

  • 225 challenging levels to solve, including the extra tough Impossiball Levels.
  • Crafty mechanics like inversed gravity, portals, tricycles and movable objects.
  • Leaderboards in all levels to race against your friends and other iO players.
  • Bronze, Silver and Gold medals to earn.
  • Dual Stick controller support.

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