Catjam 2026

# Catjam 2026 Source: [https://itch.io/jam/catjam-2026](https://itch.io/jam/catjam-2026) Make a game \(or[toy](https://itch.io/jam/catjam-2025/rate/3857624)or a[zine\!?](https://git.sr.ht/~rabbits/zine_nets/tree/master/item/src/zine_nets.tal)oh my\!\) with a[catlang](https://en.wikipedia.org/wiki/Concatenative_programming_language)\(concatenative language\) or includes a catlang in some way\. Doesn't have to be purrfect, doesn't have to be good, just has to exist\. Make it with console output\. Make it with graphics\. Make it with audio if you're feeling bold\! Experiment and have fun\. If you need a theme, uuuhhhhhh, hats\! Optional, but may that provide some kind of inspiration if needed\. ## What's a Catlang? A concatenative programming language is a point\-free computer programming language in which all expressions are functions, and the concatenation of expressions denotes function composition\. Concatenative programming replaces function application, which is common in other programming styles, with function composition as the default way to build subroutines\. Concatenative Languages Wiki:[https://concatenative\.org/wiki/view/Front%20Page](https://concatenative.org/wiki/view/Front%20Page)Join us on discord:[https://discord\.gg/Rbre4uHCt5](https://discord.gg/Rbre4uHCt5) ## Rules - ***No Generative AI***: doesn't matter if it's a big name SaaS or a local model\. All work done by***you***\(or your team\) on***your***submissions \(gamedev, artdev,***langdev******,***etc\.\) should be made without***any***AI assistance\.- If your question about this rule starts with "can***I***use a \[LLM \| generative AI model\] for\.\.\.", the answer is "NO"\. This rule operates in good faith, do not squander it by lying to our face\. - Also, if you've built a catlang before the jam, this rule applies to its development history\. If your catlang was developed with AI assistance of any kind, you will have to make a new one or use someone else's\.**This includes promotional art and branding for the project\.**You can, however, remove those and replace it with something you made\. - Vibecoded catlangs are preemptively excluded\. One such example is[Slap](https://lobste.rs/s/3fprl8/slap_functional_concatenative_language#c_kgvanm)\. - Readymade human\-made assets are allowed to be used\. Feel free to remix things from[Freesound](https://freesound.org/),[Wikimedia](https://commons.wikimedia.org/wiki/Main_Page), the[Smithsonian Open Access](https://www.si.edu/openaccess)collection, or other hubs of creative commons and public domain assets\.***Collage is an art\!***Have fun with it\. Just don't forget to credits your sources and follow whatever terms such as CC\-BY\-SA\. - Some prior*w*ork on the game itself is also allowed\. Framework, engine building, designing, mockups, etc\.\. You may even dig up some old abandon project\. Just don't submit something already finished or nearly done\. Again, good faith\. - Mature anor sexual themes should be appropriately marked\.