Everything you need to write about Eldritch OS

Eldritch OS is an AI-native, interoperable TTRPG platform for tables that play online — one workspace for prep, play, and AI assistance. It is in alpha playtest: it runs, it is rough, and tables are invited in waves to run real sessions on it and report what broke.

Built for GMs who write their own material. Characters, the compendium, campaign notes, and the virtual tabletop are one system rather than four that need syncing. The tabletop runs in the browser with maps, tokens, fog of war, drawing tools, initiative and condition tracking, scenes, and physics-based 3D dice, synced live between the GM and the players.

AI is a copilot, not a replacement. The assistant can see the campaign — its scenes and the creatures placed on them — and drafts encounters, room descriptions, and NPCs with portraits and voices against them. It cannot write to the campaign on its own: every change arrives as a proposal the GM applies or rejects, enforced by the API.

Rules are grounded in the D&D 5e SRD 5.2, with SW5E as a second ruleset, and characters import from D&D Beyond. A documented REST API with Swagger docs keeps the door open. No pricing has been set.