This jam is now over. It ran from 2019-06-01 04:00:00 to 2019-07-08 04:00:00. View 13 entries

Welcome to the Worldbuilding Jam! This jam is for creating worlds or for creating games about creating worlds!

Submissions open June 1st!

Submissions close July 1st 8th! The jam has been extended to accommodate creators that are running behind!

Jam Guidelines:

  • Your submission must be a supplement for an existing tabletop game or an original tabletop game of your own
  • Supplements must contain an original world that the game is meant to be played in, or contain rules about creating your own worlds
  • Original games must focus on an original world of your creation, or on rules for creating original worlds
  • No hateful content (sexism, racism, homophobia, transphobia, ableism, etc.), but respectfully exploring or tackling these themes are acceptable
  • Feel free to work alone or collaborate with other creators
  • Multiple submissions from the same creator are accepted

This jam is created and organized by If you have any questions about the jam, please @ or DM me on Twitter @sorryjzargo or ask in the questions section on the community tab

All submissions
Browser playable (1)

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we understand the power of that which came before us
For preparing and running overland exploration in ttrpgs
randomly generated dungeon from premade 7x7 tiles
Run in browser
Generate a world using a deck of cards: a map-drawing game for 3-5 players.
Generate factions of ne'er-do-wells. A Forged in the Dark supplement
A micro-world re-architecting game/ art game
a build-as-you-go exploratory adventure game for two to seven players
A story game about the human diaspora
A Tabletop RPG on the other side of the duels.
Slice of Life Airship Voyages
A fantasy world setting for table-top RPGs, including D&D.
some loosely-connected microgames about a world
The R&D for your RPG