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?
Key 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.
windows Minimum
OS: Windows XP+
Memory: 2 GB RAM
Graphics: DX9 (shader model 2.0) capabilities
Storage: 250 MB available space
Directx: Version 9.0
windows Recommended
OS: Windows XP+
Memory: 2 GB RAM
Graphics: DX9 (shader model 2.0) capabilities
Storage: 500 MB available space
Directx: Version 9.0
macosx Minimum
OS: OS X 10.6+
Memory: 2 GB RAM
Graphics: DX9 (shader model 2.0) capabilities
Storage: 250 MB available space
macosx Recommended
OS: OS X 10.6+
Memory: 2 GB RAM
Graphics: DX9 (shader model 2.0) capabilities
Storage: 500 MB available space
linux Minimum
OS: Ubuntu 10.10+
Memory: 2 GB RAM
Graphics: DX9 (shader model 2.0) capabilities
Storage: 250 MB available space
linux Recommended
OS: Ubuntu 10.10+
Memory: 2 GB RAM
Graphics: DX9 (shader model 2.0) capabilities
Storage: 500 MB available space
To activate the game, you need a Steam Account
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2026-04-15
Complete Our Side Quest and Win
As you probably know, in a huge variety of game titles there are usually a lot of mainline task objectives, but very often there are multiple side quests that would advance you further in the gameplay. This is exactly why we decided to run a Side Quest promotion on our YUPLAY site. In order to participate in it you have to make an order over 20€ between 17.04.2026 18:10 CET and 20.04.2026 02:00 CET, and you will get a 1€ voucher for next purchase…
The Easter season is here and since we like this part of the year so much, we have made sure to have prepared a special YUPLAY promotional campaign for those of you that are ready to go into the Raid Party and grab a FREE gaming title. All you have to do is make an order above 20€ between 02.04.2026 15:00 CET and 08.04.2026 15:00 CET, and you will get a FREE game as ab Easter present from us…