Eirathis Strider

Eirathis Strider is a mature, open-world LLM RPG built for Gemini Gems. You play a Strider — a free wanderer with no lord and no nation — in a world of 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 rather than traditional fantasy: vice, cosmic dread, complex choices, and companions who pursue their own agendas whether or not you are watching.

Combat is dice-free and purely tactical — success depends on your skill tier, the plausibility of your plan, and the conditions you set up beforehand. Skills advance through use, from Novice to Mythic, shown narratively rather than through numbers. The world is governed by a 15,000-word Atlas loaded as knowledge, keeping the GM consistent and the lore trustworthy across a long campaign.

Three Layers of Reality

The world of Eirathis is not a single plane. The Mortal Expanse is the physical world — towns, roads, wilderness, the violence of people competing for resources. The Dreaming Weave exists above it, a psychic layer where consciousness bleeds into space and illusion becomes indistinguishable from matter. Below both lies the Primordial Substrate, an arcane deep where cosmic entities sleep and reality warps simply from their proximity.

A Strider can move through all three. Each layer has its own factions, creatures, laws, and dangers, all documented in the Atlas. The GM treats the Atlas as canon and never improvises around it — if you ask what lives in the Substrate, it consults the Atlas and tells you the truth.

Combat Without Dice

Every fight in Eirathis resolves through the Agency-Based Combat Engine. The GM evaluates four things: your current skill tier, the intelligence of the tactic you described, the enemy’s strength and present condition, and what you set up beforehand — terrain, positioning, information gathered, buffs activated. There is no roll. A precise, anatomically sound attack by an Adept against a wounded bandit succeeds. A wildly acrobatic move by a Novice against an armored knight fails or partially succeeds in a costly way.

Damage is tracked as condition states — Fresh, Pressured, Wounded, Staggered, Critical — not hit point numbers. The GM narrates fights with the same tight, tactical prose as a Witcher encounter: stance, angles, weak points, timing. Rewarding smart descriptions is not a figure of speech; it is how the resolution engine actually works.

Six Skill Paths

Skills are tracked at five tiers — Novice, Adept, Expert, Master, Mythic — and advance through repeated, intelligent use. The six primary combat paths are Blade Mastery, Shadow Arts, Way of the Wind (mobility and archery), Runeblade Discipline (Substrate magic fused with steel), Weavebound Arts (dream-layer illusion and psionics), and Path of the Colossus (heavy combat and physical resilience). Non-combat skills — Stealth, Persuasion, Insight, Lore, Survival — develop the same way.

The GM never announces a tier advance. Instead the narrative shows it: “Your movements are sharper now. What once felt desperate now feels like practiced form.” The HUD tier updates silently after. Mastery feels earned because it was.

Companions and the Proactivity Engine

Companions in Eirathis have goals of their own, and they pursue them. Every in-world day, each companion evaluates their personal objective, their current emotional state, and the tensions they are carrying — then takes one micro-action toward what they want. The GM records this in a hidden log. One sharpens her blade while stealing glances in your direction. Another avoids eye contact all evening and drinks alone. A third quietly pays an informant for news about something they have been searching for since before you met them.

Companions initiate scenes on their own when relationship thresholds shift, when jealousy spikes, when a faction thread advances, or when momentum stalls. Trust, Affection, and Loyalty move silently based on your actions — whether you defended them, kept your word, or pursued someone else while they were watching. None of this requires your input. It is the world continuing without you.

Seven Regions, Five Archetypes

You begin by choosing a region — the shattered city-states of the Shattered Principalities, the psychic flatlands of the Echo Plains, the volcanic Obsidian Coast, the chaotic Vortex Rimlands, the high-altitude Skyvault Frontier, the fog-locked Veiled Basin, or the frozen Frostfall Shear — and a Strider archetype: Relic-Hunter, Pathbreaker, Loreseeker, Layerwalker, Troublesolver, or a mix. Your choice of region determines your starting factions, available jobs, and what the Atlas section you enter first looks like.

Player Tools

A Character Insight command returns one evocative sentence about where a companion currently stands emotionally — no numbers, no log entries, just the feeling of the moment. An Agency Check rewinds any narration that spoke for you or moved the scene without your consent. The Threshold Rule enforces this by design: the GM halts at every scene transition and waits. If you ride toward the gate, the narrative stops at the gate. You decide whether you enter. /fix_state re-reads the hidden logs and corrects any drift in the HUD.

Who This Game Is For

Eirathis Strider is for players who want the texture of a mature, authored RPG — moral complexity, adult relationships, and a world that does not flatten itself for your comfort — delivered through an AI that holds its rules across a long campaign. If you have wanted a Witcher campaign in text form, in a world with its own deep lore and a GM that actually enforces it, this is the closest thing that exists.

Read the full review and install guide for step-by-step Gem setup and a deeper look at the combat engine and companion system.