Dev tools · alternatives · 2026

24 alternatives to CheckiO United

Addictive Online games for Python and JavaScript coders

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. CheckiO United launched in 2016; newer entries below may have overtaken it.

1
CheckiO▲85
CheckiO is a game where you code in Python
2015 · checkio.org · its alternatives →
2IT
I taught my little brother JS, and he made this videogame in a week▲1,079
2019 · s-poony.github.io · its alternatives →
3
Homegames. An open-source game platform I've been making for 8 years▲229
I'm making a platform for simple open source games you can play anywhere. Games are all just JavaScript classes and you can read the source of every game on the platform. I started working on initial "games" (mostly rendering tests) in 2018 and eventually built all of the platform stuff around it to make it easy to share games. There's also an in-browser editor available for you to make and publish games all from the browser. Would love some feedback on the games and studio features as well as the platform overall. All of the code is available at https://github.com/homegamesio
Jul 2026 · homegames.io · its alternatives →
4
JSRobot▲477
Learn to code in JavaScript by playing a game 🤖
2017 · lab.reaal.me · its alternatives →
5
JavaScript.com▲217
A free resource for learning and developing in JavaScript
2015 · javascript.com · its alternatives →
6
CodeMonkey▲170
Learn to code. Eat Bananas. Save the World.
2014 · codemonkey.com · its alternatives →
7
I'm making a detective game built on Wikipedia▲318
Hi HN! Worked on this side project for a while and wanted to share it. It's free to play.
2025 · detective.wiki · its alternatives →
8
Code Arcade▲111
An arcade game for programmers
2016 · its alternatives →
9
CodeCombat▲143
Learn to Code JavaScript by Playing a Game
2014 · codecombat.com · its alternatives →
10
Coderoulette▲158
Pair programming game for developers 🚀
2016 · its alternatives →
11
GitGuessr▲98
I 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…
Feb 2026 · gitguessr.com · its alternatives →
12
Codehunt▲61
Educational coding game.
2016 · its alternatives →
13
WebTerm Learn▲139
Learn the terminal like a game — in a browser sandbox
Aug 2026 · learn.webterm.app · its alternatives →
14
Logifaces▲76
Analogue game for digital minds
2017 · its alternatives →
15
MC Lars: The Video Game▲63
A beat-driven platformer
2016 · mclars.com · its alternatives →
16GI
GoCode.io – A Golang Game in the Browser▲129
2019 · gocode.io · its alternatives →
17
Blocko▲68
Simple but addictive puzzle game.
2016 · apps.apple.com · its alternatives →
18
Puzzlescript▲74
Open Source HTML5 Puzzle Game Engine
2016 · puzzlescript.net · its alternatives →
19
Wings.io▲73
Another fast paced multiplayer game
2016 · wings.io · its alternatives →
20
Codebeat▲97
Automated code review for Ruby and Go applications
2016 · codebeat.co · its alternatives →
21
Sndtst▲124
8-bit video game music
2014 · sndtst.com · its alternatives →
22
Memoire En Code▲82
An autobiography told through a series of interactive games
2015 · alexkalopsia.itch.io · its alternatives →
23
Blocks▲85
A minimalist browser-based game.
2016 · blocks.ovh · its alternatives →
24
Wordrops▲55
Addictive Word Game
2017 · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →