It is mandatory that content in a game can be customised by users and shared with other users.
It doesn't have to be as an editor in a game – it can for example be just external content you load into game (e.g. like AudioSurf generates you tracks to ride based on any MP3).
Viewing post in Can you fix the description of the jam?
Should the generated content (in-game or out of the game, like modded) be marketable or I can do contents for free, like a expansion or mod of the game without making it with a price? What are the categories of this jam, so we can have an idea of what we have to do? Also, does putting the source code of the game count as “generate content for the game” since the players can edit the game itself or this doesn’t count? Thank you again!