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!
All Reviews:
Mostly Positive (75) - 77% of the 75 user reviews for this game are positive.
Release Date:
Dec 5, 2014
Developer:
Publisher:

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Recent updates View all (7)

October 17

iO update incoming!

We finally found the time, resources and nerve to fix some things that should have been fixed a long time ago. Without going into too much detail about why we couldn't have fixed it earlier, here's the list!
  • 144mhz monitor flicker seems to be fixed, feedback would be appreciated since we've only been able to test it on 2 devices!
  • Hopefully fixed a longstanding edgecase with Steam Cloud saving. The issue was caused by a discrepancy between the cloud file and the local registry storage, if the cloud files were identical it would ignore (the potentially better) local scores.
  • Various small bugfixes related to achievements
  • Optimized performance of various effects
  • Fixed performance issue on level completion, you should no longer get an FPS dip or program hang when the level completion menu opens up.
  • Added surprise after achieving 150 golden medals
It has been almost 4 years since the game was launched on Steam, but while testing and playing the game, we fell in love all over again with iO. From trying to improve some high scores to figuring out alternative ways to beat a level. Hopefully you will enjoy the game as much as we do, have fun!
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Reviews

“A highly addictive brain challenging game that will make you feel smarter as you finish each stage.”
4,5/5 – Gaming Cypher

“iO provides an entertaining romp that’s sure to test both your reflexes and brain power.”
Addictive – True PC Gaming

“iO is a smart physics puzzler that requires brainpower and a lot of trial and error.”
Smart – IGN Benelux

About This 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.

System Requirements

Windows
Mac OS X
SteamOS + Linux
    Minimum:
    • OS: Windows XP+
    • Memory: 2 GB RAM
    • Graphics: DX9 (shader model 2.0) capabilities
    • DirectX: Version 9.0
    • Storage: 250 MB available space
    Recommended:
    • OS: Windows XP+
    • Memory: 2 GB RAM
    • Graphics: DX9 (shader model 2.0) capabilities
    • DirectX: Version 9.0
    • Storage: 500 MB available space
    Minimum:
    • OS: OS X 10.6+
    • Memory: 2 GB RAM
    • Graphics: DX9 (shader model 2.0) capabilities
    • Storage: 250 MB available space
    Recommended:
    • OS: OS X 10.6+
    • Memory: 2 GB RAM
    • Graphics: DX9 (shader model 2.0) capabilities
    • Storage: 500 MB available space
    Minimum:
    • OS: Ubuntu 10.10+
    • Memory: 2 GB RAM
    • Graphics: DX9 (shader model 2.0) capabilities
    • Storage: 250 MB available space
    Recommended:
    • OS: Ubuntu 10.10+
    • Memory: 2 GB RAM
    • Graphics: DX9 (shader model 2.0) capabilities
    • Storage: 500 MB available space

What Curators Say

24 Curators have reviewed this product. Click here to see them.
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