Submissions open from 2026-03-14 15:00:00 to 2026-04-14 15:00:00
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EVERY CAVE TELLS A STORY OLDER THAN FIRE.

HELLO! This is a TTRPG jam to make caves. Or lairs.

I humbly suggest you make something for the feral prehistoric rpg Year 100 Million B.C.
The rules are free and available here or here on itch.

However, this jam is of course open for any system. Making stuff > not making stuff! Simple maths!

The fantastic artist Tony Tran has graciously provided some cave-ish art that you can use! Download download here!

I’ve made a few empty cave maps that you are free to use, download download here.

The only rule is to NOT make bigoted stuff, if you do your submission will not be included.

You're welcome to come share your progress and finished caves in the Year 100 Million B.C. Discord server.



See you in the caves!