A mature, Witcher-style open-world RPG for Gemini — dice-less tactical combat, skill mastery, and companions who live their own lives.
Eirathis Strider is a free, two-file LLM RPG built by Arcanum RPGs for Gemini Gems. You play a Strider — a free wanderer with no lord and no nation — across three overlapping layers of reality: the physical Mortal Expanse, the psychic Dreaming Weave, and the arcane Primordial Substrate. The tone is adult and morally grey, drawing from The Witcher and BG3.
Combat is dice-free and purely tactical — success depends on your skill tier, the plausibility of your plan, and what you set up beforehand. A 15,000-word Atlas keeps the world's lore consistent across a long campaign.
★ 4.8/5 — read the full review
| File | What it's for |
|---|---|
eirathis-strider-master-prompt.txt |
The game engine — rules, hidden state tracking, agency protocols. Paste this into your Gem's instructions field. |
atlas-eirathis.docx |
The world atlas — the three layers of reality, factions, creatures, magic. Upload this as a knowledge file. |
- In Gemini, open the Gem manager and create a new Gem.
- Paste
eirathis-strider-master-prompt.txtinto the instructions field. - Upload
atlas-eirathis.docxas a knowledge file. - Save and start playing.
Full step-by-step instructions — plus what to do if the game starts drifting — are in the install guide.
- Three layers of reality — the Mortal Expanse, the Dreaming Weave, and the Primordial Substrate, each with its own factions, creatures, and dangers.
- Dice-free tactical combat — the Agency-Based Combat Engine resolves fights from your skill tier, your tactic, and what you prepared beforehand.
- Six skill paths advancing from Novice to Mythic through use, shown narratively rather than as numbers.
- Companions with their own agendas — the Proactivity Engine has every companion pursue their own goals daily, whether you're watching or not.
- Seven regions, five archetypes to choose your starting position from.
Arcanum RPGs is an independent directory and review site for AI-run text RPGs, and the Arcanum Originals are our own engineered games. Every Original is free to play — we design them, you play them on the AI you already use.
- Full review & install notes
- Design essay: why Eirathis fights you with the world itself
- All Arcanum Originals
- The full AI RPG directory
This repo has no open-source license. It's public so you can read, download, and play the game for free — that's the whole point — but no license is granted to redistribute, resell, or publish modified copies. If you want to build on top of this system, get in touch.