CheckiO
CheckiO is a game where you code in Python
CheckiO launched on August 12, 2015 with 85 votes, #532 of 3,588 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 11 years on.
What it does
CheckiO - coding websites and programming games. Improve your coding skills by solving coding challenges and exercises online with your friends in a fun way. Exchanges experience with other users online through fun coding activities
Here on CheckiO we are creating games for coders. We have made py.checkio.org and js.checkio.org where you can improve your TypeScript and Python coding skills. We have also created Empire of Code - a space game with a mix of strategy, tactics and coding. In addition to the 50k monthly active Python and TypeScript players, who are constantly improving their skills by engaging in CheckiO missions and analysing other members’ solutions, CheckiO is used in more than a 100 different schools and universities. There are a lot of different ways in which we can assist companies. CheckiO is a great promotional tool for your services. JetBrains and Hired have proven our effectiveness to offer…from checkio.org
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GitGuessrFeb 2026 · gitguessr.com · ▲98I built this game as a playful way to train code reading skills. You're dropped into a random location in a real GitHub repo where some lines code are hidden. The goal is to pick up clues from the surrounding code and fill in the missing lines as quickly as possible. It currently has curated game content for Python, TypeScript, JavaScript (by most metrics the top 3 languages on GitHub). I had the idea when it dawned on me that reviewing and understanding code spat out by an LLM is a key skill for the AI era. (I sincerely hope you're critically reviewing what your favorite LLM is serving…
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