• New missions, team members and features!

Ghost Age and Bats Bunker need your ‘random reviews’
Our Halloween-themed challenges Ghost Age and Bats Bunker are both nearing completion. We need YOU to review the solutions of your fellow players. You won’t see who published the solution, nor other code reviews, because we’re wondering what you really think! ;)

New to the team: Developer Evangelist Floor
We’re happy to welcome Floor to the team. She’ll be your go-to person for all your questions regarding CheckiO. Whenever she’s not hanging around in our forum, she’s involved with organizing and coaching at Rails Girls events, the Ruby User Group in Vienna, PyLadies Vienna or virtually anything that helps beginners get into the wonderful world of programming.

New mission: The Haunted House
Stephen has discovered a spooky old house in the woods. The only exit from the house is the northern door in the 1st room. While exploring the last room he heard a haunting groan followed by a grinding noise and the sound of chains rattling. Terrified, Stephen now turns to you for help escaping the house. You'll both need to make it to the first room without encountering the ghost, for if you meet it, bad things may happen...

Create your own CheckiO challenge!
Starting from the 9th level, you’ll see a link to the GitHub repository of any challenge you get your hands on. You know what that means? You can fork the challenge to make it your own and create your own challenges for CheckiO. Talking about next level gaming! ;)

Creating a new kind of missions - we need your feedback!
We’re thinking about creating a new kind of missions, we would love to hear what you think on the forum!

Become Awesome

  • No Ads
  • No Limits
  • More Content

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