Game Off is an annual month-long game jam hosted by GitHub, with the 2023 theme being "moonshot," which inspired over 500 creative game submissions. The event showcases a diverse array of top-rated games as voted by developers, featuring various genres, from story-driven platformers like "A Trip to the Moon" to multiplayer ship-programming games like "Launch Party," and unique concepts such as "Catapult," where players launch cats to the moon. Participants can play these games on multiple platforms, including Linux, macOS, Windows, and the web, with source code available for many, encouraging experimentation and learning. The event fosters a sense of community through its forums and Discord, where participants can share feedback and support each other, making it a special annual celebration of creativity and open-source collaboration.