11 Best LLM RPG Games You Can Play Inside ChatGPT, Claude & Gemini Right Now
Most “AI RPG” lists are about standalone apps and Steam games — products you download, accounts you create, subscriptions you pay for. This list is different. Every entry here runs directly inside ChatGPT, Claude, or Gemini — the AI you already use, on the device you already have, with no install, no new account, and no paywall. Load a game, start playing. That’s the whole setup.
This is the niche nobody else is covering properly: LLM-native roleplay experiences designed specifically for the frontier models, built to exploit what they’re actually good at — long-form narrative, character voice, world-building — while engineering around what they’re bad at. The best ones on this list have spent serious effort solving the problems that kill most AI campaigns: memory drift, passive NPCs, and the model losing the thread around turn 50. If you want to know why those problems happen and how good engines fix them, our guide on why AI campaigns fall apart covers it in depth.
Here are eleven of the best LLM RPG games available right now, starting with the ones built right here.
1. Aevum Realm Architect — Best for Strategy & Kingdom-Building (Claude / ChatGPT / Gemini)
The most mechanically ambitious LLM RPG on this list. Aevum Realm Architect casts you as a serf with one copper piece and tasks you with rising to monarch across a five-nation, low-fantasy world built on 30,000 words of Atlas lore. Every outcome is weighted by preparation, resources, and choices — not random rolls. Its signature feature is the Deference Engine: a strict enforcement of medieval social hierarchy that means a wrong look at a noble can get you flogged. Every rung of your rise is genuinely earned because the game never lets you forget how far down you started.
Beyond the social simulation, Aevum runs a full tag-based domain economy, tactical battles resolved by battle plan and force composition, diplomacy, spycraft, and romance mechanics with real relationship consequences. A hidden GM notepad tracks every asset, faction, and NPC across long campaigns, with automatic memory pruning to keep coherence over hundreds of turns. There is also a /fix_state command for correcting drift — an honest admission that LLM state tracking is imperfect, and a practical tool for when it is.
Deep, complex, and demanding. Not for the impatient — but no other LLM RPG comes close to its ambition. Read our full review or download the files free.
Runs on: ChatGPT (Custom GPT), Claude (Project), Gemini (Gem)
2. The Chronicler — Best for Slow-Burn Relationships (Claude)
The Chronicler is the antithesis of every AI RPG that measures relationships in hearts and meters. Its design philosophy is uncompromising: if a relationship can be measured, it is already broken. No affection bars, no “romance unlocked” prompts. Companions show their feelings only through tone, initiative, willingness, and behavior over time. Desire does not equal trust. Trust builds slowly and breaks fast. Silence is a valid outcome.
Built specifically for Claude Projects, it uses a dedicated companion engine called RomanceCronos — a full relationship rulebook loaded as a knowledge file. Every companion pursues their own goal daily, whether or not you interact with them. A proactivity engine keeps the world alive between your actions: a companion sharpens her blade while stealing glances at you; another avoids eye contact all evening and drinks alone. Romance can emerge from either side, but it is never forced and never assumed.
The strictest player agency system on this list — the GM never speaks or acts for you, and an Agency Check command rewinds any overstep instantly. Download free and read the full install guide for Claude Projects.
Runs on: Claude (Project) — optimised specifically for Claude’s long context and instruction-following
3. Eirathis Strider — Best for Mature, Witcher-Style Adventure (Gemini)
If you want the tone of The Witcher, Dragon Age, or Baldur’s Gate 3 in a text RPG, Eirathis Strider delivers it. You play a Strider — a free wanderer with no flag and no lord — exploring a world of three overlapping realities: the physical Mortal Expanse, the psychic Dreaming Weave, and the arcane Primordial Substrate where cosmic beasts sleep and warp reality simply by existing.
The tone is mature and adult throughout: drinking, vice, morally grey choices, complex romance, jealousy, and real consequences — all handled with the Witcher’s restraint (fade to black, not explicit). Its standout mechanic is a dice-less tactical combat engine: fights resolve on your skill tier, the intelligence of the tactic you describe, and the enemy’s current condition — never a random roll. Your abilities grow from Novice toward Mythic through smart play, shown narratively rather than through XP bars.
Built for Gemini Gems, with the full world Atlas as a knowledge file. Download free and read the Gemini setup guide.
Runs on: Gemini (Gem) — optimised for Gemini’s strong instruction-following and long knowledge files
4. Star Freighter Drift — Best for Sci-Fi & Survival (ChatGPT / Claude / Gemini)
The only sci-fi entry on this list and arguably the most original concept. Star Freighter Drift puts you in the cockpit of a beat-up cargo hauler in a lawless post-collapse star system, with a tagline that doubles as its entire design brief: run cargo, dodge customs, keep the reactor from melting.
Three mechanical pillars in constant tension: a real freight economy where you buy low and sell high across six distinct star systems; a five-state Heat track where contraband pays far more but draws the law; and a ship integrity system where pushing the reactor to escape a customs cutter is often the same move that melts the engine. The profitable choice is always the dangerous one. A crew proactivity engine keeps your shipmates pursuing their own goals and initiating scenes — the loneliness and friction of deep space, rendered in text.
Runs on all three major models. Download free and read the full install guide.
Runs on: ChatGPT (Custom GPT), Claude (Project), Gemini (Gem)
5. Perchance AI RPG
One of the most-searched AI RPG tools in 2026. Perchance offers a free, no-signup text RPG that runs entirely in your browser — no model subscription required. The experience is more structured than a raw LLM session, with preset scenario templates covering fantasy, sci-fi, and romance. It is the fastest way to start an AI text adventure from cold. The tradeoff is depth: Perchance uses its own model with limited context, so long campaigns degrade faster than engineered systems on frontier models. Strong starting point for newcomers; limiting for experienced players who want sustained coherence over many sessions. See how it compares to dedicated platforms in our clients directory.
Runs on: Browser (Perchance’s own model)
6. AI Dungeon
The genre’s starting point. AI Dungeon established what LLM text adventure could be and its community has built thousands of scenario templates across every genre imaginable. The fundamental tradeoff is breadth over depth: total creative freedom, but no persistent world state, no game mechanics beyond the narrative, and memory that degrades as the context fills. It shows its age against more engineered systems — but for players who want pure narrative freeform with no setup whatsoever, it remains a valid entry point. Read our full AI Dungeon review for the current verdict, including where it falls short.
Runs on: Browser, iOS, Android (multiple model tiers, freemium)
7. RoleForge
The LLM RPG that took a fundamentally different approach to the memory problem: instead of asking the model to track state, RoleForge runs a SQL database that manages the world, and the LLM simply narrates what happened. The result is near-perfect structural persistence — your gold doesn’t disappear, your quest progress doesn’t drift, the rules don’t bend. For players who have been burned by LLM inconsistency and want earned victories with strict rule adherence, RoleForge is the most technically honest solution on this list. The tradeoff is flexibility — the SQL backbone that makes it consistent also constrains what’s possible. See our full assessment in the clients directory.
Runs on: Browser, free
8. Janitor AI (with external model)
Janitor AI is the largest community character-library platform, with tens of thousands of user-created characters and the ability to connect your own API key. For LLM RPG players specifically, the “bring your own model” feature means you can connect Claude or GPT-4 and run sessions with your preferred frontier model while browsing Janitor’s extensive character catalogue. It is a different experience from an engineered game system — more character-chat than campaign — but for players who want a massive library and model flexibility, it is one of the most useful clients available. See our full assessment in the clients directory.
Runs on: Browser (bring-your-own-model via API)
9. Friends & Fables
The most structured client on this list. Friends & Fables is a visual AI game master with hex battlemaps, token movement, and a GM named Franz who actually maintains session state. For players who want tabletop RPG structure — initiative, spatial combat, party coordination — rather than pure narrative freeform, Friends & Fables is the most complete LLM client available. The visual layer adds real tactical weight that pure text sessions lack. Full review in our clients section.
Runs on: Browser, freemium
10. A Custom Claude Project (DIY)
Worth naming explicitly: a well-crafted Claude Project with a strong system prompt and a knowledge file is a legitimate LLM RPG in its own right. Claude’s long context window, instruction-following, and prose quality make it the strongest single model for sustained narrative campaigns. If you have a specific genre, world, or tone in mind that no existing engine covers, building your own Claude Project is more achievable than it sounds. Our guide on why AI campaigns fall apart covers the engineering decisions that separate a campaign that holds together from one that collapses at turn 50 — it is the practical starting point for anyone who wants to build their own.
Runs on: Claude (Project), paid plan required
11. A Custom ChatGPT GPT
The equivalent for ChatGPT. Custom GPTs — available to ChatGPT Plus subscribers — let you package a system prompt, knowledge files, and conversation starters into a shareable game. The ecosystem of community-built GPTs includes some genuinely inventive LLM RPG experiments, and the GPT Store makes discovery easier than hunting for prompts on Reddit. The tradeoff versus Claude Projects is context length: GPT-4o handles long sessions well but can lose thread in very extended campaigns faster than Claude’s extended context. For players already on ChatGPT, building or finding a well-made Custom GPT is the natural starting point.
Runs on: ChatGPT Plus (Custom GPTs)
How to Pick the Right LLM RPG for You
The most important question is what you actually want from a campaign:
- Maximum depth and systems → Aevum Realm Architect. Nothing else on this list matches its mechanical ambition.
- Character-driven slow burn → The Chronicler. Built for players who care more about people than loot tables.
- Mature, open adventure → Eirathis Strider. The closest thing to a Witcher campaign in text form.
- Sci-fi survival → Star Freighter Drift. The only serious space-trading LLM RPG in existence.
- Just want to start immediately → Perchance or AI Dungeon. No setup, no files, play now.
- Want a platform for long campaigns → Browse our full clients directory for an honest comparison of every major LLM roleplay platform.
All four Arcanum Originals are free to download. Load the files into your AI of choice, follow the setup guide on each game’s page, and start with a world built to last more than fifty turns.