Everything you wanted to ask.

Yes. Mantlenaut is free to play, with no download and no pay to win. Everything that matters in the game is found, forged or earned in the world.

Later there may be optional extras, such as items other players make in the Store. They will always be optional, clearly priced, and they will never make anyone stronger.

The alpha is open now: press Play for free and you can be in the game in your browser. It is still being made, so expect rough edges and new updates every week.

A computer (Windows, Mac, ChromeOS or Linux) in Chrome or Edge, or an Android phone or tablet in Chrome.

The first time you play, the game spends a few seconds testing your device and picks settings that suit it, from a light mode for older phones to full effects on a gaming PC. You can change them any time.

No. The game runs in the web page: no installer, no launcher. Your worlds and settings are kept in your browser on that device.

On a Windows gaming PC you can also download the free desktop app: the same game on its own, always on your best graphics card.

Yes. Keyboard and mouse, an Xbox-style controller (every menu works with it) or touch controls on a phone or tablet. You can remap the keys, tune the controller and change the touch layout.

Yes: up to 32 players in one world. Host your world from the pause menu and share the join code or invite link. Friends can join from a browser or a phone.

Mantlenaut has monsters and combat, but no gore, and no open chat with strangers: online play is only with people who have your join code.

Player accounts are for ages 13 and over. Younger players can play without one; their worlds are simply kept on their device. Parents can contact us about anything at any time.

Worlds are saved in your browser on your device first. Signed in, you can also keep a world in the cloud, so it follows you from one device to another (up to 20 worlds, 16 MB each, 128 MB in all). You can export a world to a file to keep a copy or give it to a friend, and import one back in.

No ads and no trackers. The website counts visits without cookies, and the game sends us crash reports so we can fix problems. The details are in our privacy notice.

The alpha is invite-only for now. When the game opens, it will be free for everyone right here.

Thirty-one legends are in the game now, each fought its own way: the Kraken and the Rider in its head, the Mantle Wurm, Marrowking, the Lanternfall, the Long Choir, the Brine Warden, Mimic, the Unending, the Snapping Choir, Glasswake, the Homemaker, Azurith, Goldgut, the Salt Pan King, the Underwood under the forests, the Stormherd on the peaks, the Marching Keep by night, Brainless in your fields, the Shepherd of Spores in the jungle and, out on other worlds, the Tun, the Hitchhiker, the Sculptor, the Etcher, Gravewell, the Thousand Eyes, Glassback, Yesterday and Pulse. More are on the way: see the monsters.

Blades and spears you forge from what you mine, and an assault rifle once you can work steel. At sea you man a sailing ship's cannons by hand, and the big warships have turrets that lay themselves on your target: a battleship's broadside is heard for miles. Out in space there are railguns and missiles.

Our own 3D builder, inside the game. Make anything from shapes, kits and letters, paint it in over 640 looks, try it in your world with one click, and upload it for the Store. More about Starforge.

Over 5,000 things for your worlds, from a copper kettle to a 2,400 m starship carrier: ships, submarines, airships, starships, cars and things for every room. Everything in it is free while Mantlenaut is in alpha, and nothing in it is needed to play. Browse the Store.

Use the contact page. Choose "Report a player" to tell us about someone breaking the rules.