• The world is changing

Hi there.

Some great upgrades have been released today. Enjoy!

We split our badges into 3 colors depending on their complexity. If you have any ideas what other badges can be created on CheckiO - feel free to share with us. They can be for serious achievements or any other crazy idea you have.

These 3 colors have been used for stations icons as well. Now stations will have 3 colors: if you solved less than 50% of missions, if you solved more than 50% of missions and if you solved all the missions.

Every time when a station changes a color - the world around this station changes as well.

“Find Enemy” - a new mission for CheckiO that has just been released. Thanks to our awesome user kurosawa4434.

During this past year, we have been working on improving the CheckiO platform as well as on implementing several monetization ideas. We have good progress in both of these areas and on a path to self-sustain - which means more and bigger games for you.

Here is a very short survey for you. It’s for us to figure out the next best step. It takes 10 secs <3


Welcome to CheckiO - games for coders where you can improve your codings skills.

The main idea behind these games is to give you the opportunity to learn by exchanging experience with the rest of the community. Every day we are trying to find interesting solutions for you to help you become a better coder.

Join the Game