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Brotherwise Games

Plotweaver

The system underneath the Cosmere RPG — and, increasingly, underneath other people’s games too.

I

What it is

An original system by Brotherwise Games. It starts from familiar d20 bones and then changes three things that matter.

The plot die
A second die that turns a flat pass or fail into a story beat. It brings Opportunities and Complications to the table, and it is why a Cosmere RPG combat reads differently from a d20 combat even when the numbers look similar.
Paths, not classes
You build a character out of talent trees rather than picking a class and following it down. Multipathing is the norm, not an exception you pay for.
Magic as a skill
Invested arts are tested like anything else, which puts the weight on approach and degrees of success rather than on a spell list.
An open licence
Brotherwise is releasing Plotweaver under an open game licence aimed at indie publishers. Their own line: content you create using your own IP is yours to share and monetise without limitations.
II

Why it matters for the Cosmere RPG

Most of the Cosmere RPG is really Plotweaver wearing Roshar or Scadrial. Fast and slow turns, focus as a spendable resource, the three defences, the plot die, talent trees eight deep — none of that is Cosmere-specific. It is the system, and the setting books sit on top of it.

III

Where it is up to

Open Alpha
Live since 5 August 2026, with three playable settings now in it.
Erstwild (August)
Original fantasy — spirits, old magic, and ancient dangers in a world you build your own path through.
Splinterlight (September)
Science fiction — a galaxy-spanning government has collapsed, and you're one of the people rebuilding from what's left.
Hexbeat (October)
Urban fantasy — magic is returning to a modern Earth that was never built to hold it.
Earthborne Rangers RPG
An official adaptation with Earthborne Games, bringing their cooperative card game to the tabletop as a Plotweaver game. Expected in 2027.
Infinite
A new genre-hopping setting from Keith Baker (Eberron) and Jenn Ellis of Twogether Studios, built to showcase Plotweaver.
Plotweaver Setting Search
A submissions contest for an original setting, judged by Keith Baker, with the winner published by Brotherwise. Opens for entries in early 2027.
System Reference Document & crowdfunding
An SRD is expected ahead of the crowdfunding campaign, still slated for Q2 2027.

Status as of 16 October 2026, from Brotherwise's Gen Con 2026 announcements and plotweaverrpg.com. Full setting write-ups are on their Worlds page; pre-launch dates move, so check their news page for anything more recent.

Ways in, if you want one. Brotherwise runs an Envoy Program for GMs who demo the game publicly, a Plotweaver Academy Patreon for early access and developer insight, and a freelancer interest form for writers and editors. All three are on their site.
V

The official server

Brotherwise runs their own Discord for the Cosmere RPG — release news, rules questions, and the community building for it.

Official Cosmere RPGBrotherwise’s own server for the gamediscord.gg/cosmererpg
Tap a code on a phone, or scan it. None of these invites expire.