A downloadable game engine for Windows, macOS, and Linux

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ct.js is a new game editor (desktop app) based on web technologies, currently in active development. Our aim is to make it a simple game-making tool, accessible for both newbies and experienced game developers. It runs on WebGL and provide good performance both on PCs and mobile devices.


Catsteroids: an arcade space shooter with asteroids, starships and bonuses. Greed: a silly platformer about being too greedy to collect all the coins in a puzzled level. Memocats: a traditional memory game with matching cards.


Easy to learn and use
ct.js is designed to be used for learning and teaching programming. It is accessible and ready-to-use for both newbies and pros.

Highly extensible library
ct.js's core is small but powerful, and its modules can add you more abilities and higher-level functions.

Runs on PC, Mac, Linux
That's it. We support them all. One tool for everyone in your team, in any office or garage.

Games that run everywhere
Games created with ct.js run in any modern browser, including mobile ones, and can also be packed to executables for all the major desktop platforms!

Made with ct.js

Welcome to the VOID: You were awakened by your Anabot only to know that the universe is dead. StormCross: Save your colony from a deadly disease! I Like Dreams: A tiny text adventure about dreams ๐ŸŒœ๐ŸŒฒ (aka Among the Wolves): ๐Ÿš๐Ÿ’ฅ ๐ŸŒœ๐ŸŒฒ๐ŸŒฒ๐Ÿ™‹๐Ÿ”ฅ๐Ÿ™†โ€๐ŸŒณ๐ŸŒณ๐Ÿบ Disposable Magic: After a long adventure you finally face the Evil Sorcerer… Shifted: A relaxing jigsaw puzzle. Take a blanket and a cup of tea.

There is more!

Partner — Mini Jam

Mini Jam is an open recurring game jam that is held every two weeks on itch.io.
Join their Discord server or visit their official site!


Download NowName your own price

Click download now to get access to the following files:

ct.js for Windows x64 229 MB
Version 1.4.2
ct.js for Windows x86 226 MB
Version 1.4.2
ct.js for Linux x64 239 MB
Version 1.4.2
ct.js for Linux x32 244 MB
Version 1.4.2
ct.js for OSX x64 263 MB
Version 1.4.2
Bonus! A free asset pack 3 MB

Development log

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