The management sim where you operate a living MMORPG. Paint zones, place monsters, design classes, gear and quests, and run the economy with vendors, auction houses, and flight fares. Then thousands of autonomous adventurers move in, level up, trade, and pay the subscriptions that fund you.

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Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“MMOS is a simulation that comes alive in ways we cannot fully predict on our own. Thousands of autonomous adventurers make their own choices inside the world you build, and the fun lives in how those choices ripple through your economy, your factions, and your subscriber numbers. The only way to tune a system like that well is to watch it run across thousands of different worlds, built by thousands of different operators.

That is exactly what Early Access gives us. Every island you build, every economy that booms or collapses, and every adventurer that gets bored and unsubscribes is a data point we can learn from. We want to balance the emergent systems, sand down the rough edges, and decide what to build next with the community in the room rather than guessing in isolation.

The core game is already here and fully playable: build your world, place your content, run the economy, and keep your player base subscribed. Early Access is about deepening it together, with the people who actually operate these worlds telling us what their adventurers need next.”

Approximately how long will this game be in Early Access?

“12 months ”

How is the full version planned to differ from the Early Access version?

“Our goal for the full version is a deeper, richer toolbox for the operator and a more complete world for the adventurers to live in. The Early Access version already lets you build the world, run the economy, and keep a living player base subscribed. From there, we plan to grow the simulation in a few directions:

- A closed economic loop. We plan to expand crafting so that the materials adventurers gather actually feed demand, and to develop a market that discovers its own prices. We want the economy to be something you genuinely manage, with supply, demand, and player wealth all influencing one another.

-More content for you to author. We plan to add operator-created quests and to deepen the existing systems for gear and character builds, including richer class and role options for adventurers. We would like you to have more levers for shaping what your world rewards and how your players spend their time.

- Dungeons and destinations. We plan to develop dungeons and set-piece content that you design and place, in the spirit of building attractions for your players to seek out. We're exploring how to make these feel like rides worth queuing for rather than just another grind.

- Endgame and long-term retention. We plan to introduce more late-game progression and goals, so that veteran adventurers have reasons to stay subscribed and keep playing the world you have built.

-More depth across the board. We also plan to keep refining adventurer behaviour, faction dynamics, balancing, and quality-of-life tools throughout development.

- Some of these plans may change as we learn from the community and watch how real worlds play out, and the exact final scope will be shaped by that feedback."”

What is the current state of the Early Access version?

“MMOS is fully playable and stable right now. This is a complete, working management sim, not an early prototype. You can start a world today and play the full core loop from beginning to end.

What you can do today:

- Build your world. Sculpt islands and terrain, paint zones, lay roads, and place towns, cities, NPCs, and
decoration. Set up faction spawners and PvP areas.
- Populate it. Autonomous adventurers move in and play your world on their own. Each one has its own personality and motivations, so they level up, hunt monsters, gather resources, form parties, chat, travel, and decide for themselves what your world is worth to them.
- Run the economy. Stock vendors as gold sinks, open an auction house where adventurers list and buy each other's loot, set flight-path fares for fast travel, and watch the money supply you mint and burn.
- Author content. Create items and gear with quality tiers and effects, set up gathering professions, tune drop tables, and balance your factions.
- Manage and grow. Subscriptions roll in from the adventurers who stay happy. Detailed economy analytics track your gold flow, player wealth, and experience rates with charts and leaderboards, so you can see your world's health and reinvest in expanding it.

The game runs the whole simulation headlessly and deterministically under the hood, and saves and loads multiple worlds reliably.

What to expect:
We are actively balancing the emergent systems, and some of the larger features described above, such as crafting, operator-authored quests, dungeons, and endgame progression, are still in development and not yet in the build. You may encounter rough edges or balance quirks as we tune the world alongside the community. If the loop described here sounds fun to you as it stands, it is a great time to jump in. If you are waiting on the deeper content additions, you may prefer to wishlist and follow along.”

Will the game be priced differently during and after Early Access?

“We plan to slightly increase the price once we exit early access.”

How are you planning on involving the Community in your development process?

“Community feedback is central to how we want to build MMOS, because this is a simulation that reveals itself through play. Every operator runs their world differently, and watching how those worlds grow, boom, or collapse teaches us things we could never learn on our own.

We plan to make our Discord the main hub for that conversation, where players can share the worlds and economies they have built, report bugs, suggest features, and talk directly with us about what their adventurers need next. We also plan to use the Steam Community discussions and our website to gather feedback, share development news, and keep players informed about what we are working on.

We are especially interested in how the emergent systems play out in your hands. The balance of the economy, the behaviour of the adventurers, and the tools you use to shape your world are all things we want to refine based on real worlds rather than guesswork. We plan to listen closely to where players hit friction, what content they want more of, and which ideas excite the community, and to let that feedback help guide what we build and prioritize during Early Access.

In short, we plan to develop MMOS in the open, with the people who actually operate these worlds helping us decide where it goes.”
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This game is not yet available on Steam

Planned Release Date: Q4 2026

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About This Game

You run the MMO. They play it.

Most games put you inside the MMORPG. This one puts you in the chair behind it. You are the studio, the live team, and the world designer all at once: you build the zones, stock the dungeons, author the loot, set the prices, and open the systems. Then you step back and watch thousands of fully autonomous adventurers move into your world, form parties, grind levels, chase gear, haggle on the auction house, die to your monsters, and — if your world is good enough — keep paying the monthly subscriptions that fund everything you do.

It's SimCity meets WoW, with a pinch of RollerCoaster Tycoon: a top down living-world management sim where every subscriber is a simulated player with their own goals, and your job is to build a world worth playing.

The core loop

  • Build the world. Paint terrain, carve zones, lay roads, plant the wilderness, and place the monsters, towns, and points of interest that give your MMO a shape.

  • Stock the content. Author monsters, loot tables, gear, consumables, quests, and gathering nodes. Decide what drops, where, and how rare it is.

  • Run the economy. Open vendors, an auction house, and a flight-path network. Set fares, prices, and policies. Manage the flow of gold so your world stays healthy instead of inflating into chaos.

  • Grow your playerbase. A good world attracts and retains subscribers. Watch the population, the gold economy, and the XP curves — then tune the world to keep adventurers happy and paying.

A world that actually plays itself

The adventurers aren't scenery. Each one is an autonomous agent with a personality built from a weighted blend of player-type drives — the killers, achievers, explorers, socializers, and the gold-obsessed traders. Those drives shape what every adventurer chooses to do moment to moment:

  • Levelers push into tougher zones as they outgrow the easy mobs.

  • Treasure-hunters farm monsters for their most profitable drops.

  • Gatherers learn professions and work resource nodes.

  • Traders buy low and sell high on the auction house.

  • Explorers spend real gold on flight paths to see the far corners of your map.

They form parties, share threat in combat, level up, gear up, go broke, get rich, and occasionally die — all emergently, all driven by the world you built. Click any adventurer to read their thoughts, see their drive profile, inspect their gear and professions, and watch their personal story unfold.

Deep authoring tools

  • Terrain & zones — paint grass, water, roads, and hazard tiles like lava; define polygon zones with their own identity; plant trees and decorate the wilds.

  • Monsters & spawners — author creatures with stats and loot tables, then place spawners that keep your zones populated.

  • Gear — design weapons, armor, and offhands with slots, level requirements, two-handed rules, and combat-stat effects. Every item has a quality tier from common to legendary that drives both its power and its rarity on the avatar.

  • Consumables, materials & quests — potions, crafting materials, gathering nodes, and quest content for your adventurers to chase.

  • Factions & PvP — set up rival factions, balance their populations, and let the conflict play out.

A real, self-correcting economy

Gold isn't a number that only goes up. The simulation models faucets and sinks: monsters mint gold when looted, while vendor purchases, flight fares, and auction deposits drain it back out. Item prices are world-derived from each item's identity and quality, then nudged by live supply and demand. A built-in economy dashboard tracks gold minted vs. burned (with per-source breakdowns), population, wealth leaderboards, and XP rates over time — so you can spot inflation, dead content, or a broken market and fix it.

Tune everything

A sandbox tuning layer lets you adjust the rules of your world, and a seeded simulation means you can reproduce and experiment with worlds deterministically. The whole thing runs as a living, headless simulation under a stylized, flat illustrated art style — readable, colorful, and built entirely from programmatic visuals and synthesized audio, with a day/night sky cycle overhead.

Genre & style

  • Genre: Management / tycoon / living-world simulation

  • Play style: Single-player, sandbox, endlessly tweakable

  • Vibe: Build-and-observe — set the systems in motion, then watch the consequences ripple through a world of thousands

If you've ever finished a raid and thought "I could have designed this better," this is your chair.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI has been used to generate music

System Requirements

    Minimum:
    • OS: Windows 10
    • Processor: Any
    • Memory: 4 GB RAM
    • Graphics: Integrated
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