Arcanum Originals
Our own packaged worlds. Download the files, load them into your AI, and play systems built with an obsessive level of detail — not available anywhere else.
Star Freighter Drift
Run cargo, dodge customs, and keep the reactor from melting — a gritty space-trading RPG for ChatGPT, Claude, or Gemini.
Aevum Realm Architect
Rise from serf to sovereign in a deterministic kingdom-builder that runs on ChatGPT, Claude, or Gemini.
Eirathis Strider
A mature, Witcher-style open-world RPG for Gemini — dice-less tactical combat, skill mastery, and companions who live their own lives.
The Chronicler
A slow-burn, relationship-driven RPG for Claude where trust is earned, never unlocked, and companions live their own lives.
All games are free to play on your own AI. If they gave you a good session:
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✉ Arcanum Weekly
The pulse of the AI RPG field, once a week — new releases, platform shifts, and what we ship next. Written mainly for developers, with a section for players.
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Arcanum Originals are complete, engineered RPG systems — not character cards, not bare prompts. Each one is a master prompt plus a world knowledge file, designed together to run a specific kind of campaign with real mechanical depth and world consistency across long sessions.
The kingdom-builder tracks your domain, your treasury, and the social hierarchy you navigate on the way to power. The relationship RPG tracks companion goals, trust, and emotional state without a single visible meter. The mature open-world adventure enforces dice-less tactical combat across a three-layer cosmology. The space-trading survival sim tracks cargo, customs heat, and reactor temperature in genuine tension with each other.
All four are free to download and play on ChatGPT, Claude, or Gemini — load the files into your existing AI and play worlds you will not find anywhere else.