Langjam Gamejam

A 7-day hackathon where you build a programming language and then make a game using it.

Dates: December 14, 2025 – December 20, 2025

Langjam Gamejam is a 7-day challenge to create a programming language and then use that language to build a game. You set the rules. Be as creative as possible, use any technologies you want, and have fun. There will be prizes for the most creative submissions!

Rules

  • The hackathon runs for 7 days
  • You must design and implement a programming language
  • You must design and implement a game using your language
  • You can use any language, engine, libraries, and technologies
  • You define what a programming language is and what a game is
  • Work solo or on a team
  • Documentation and instructions are encouraged
  • Bonus points: Write a blog post about your language, game, and design process

Join the jam and submit on Itch.io.