Cloud saves and accounts | Mantlenaut Wiki

Signing in

Accounts are optional. You can play without one, and your worlds stay on the device you play on. To keep worlds in the cloud, sign in from the main menu: use the account button at the bottom of the main menu, then:

Sign in with your name or email, and the code the email brings you.
Make an account with a name, an email and a password, then the code from your email.
Forgot your password? You get a code by email to set a new one.

The first time you sign in, you are asked your month and year of birth. Accounts are for players aged 13 and over. A younger player can still play, with their worlds on their own device, but Play with friends is never shown to them. For a player under 13, a parent or guardian's email is asked for, and their code keeps the account. Signed in, you stay signed in on that device until you sign out.

Signing out saves your world first. The account name is shown at the bottom of the main menu.

The Cloud saves tab

With an account, the pause menu (Esc) and the main menu's Cloud saves both open the Cloud saves tab. It puts every world on this device and every world in your cloud on one list, and shows where each one stands:

Label	What it means	What you can do
In step	This device and the cloud have the same world.	Nothing to do.
Only on this device	The world has never been sent up.	Send it to the cloud.
Only in the cloud	The world is not on this device yet.	Bring it here, or bring it here and play.
This device is newer	You played here since the cloud copy was made.	Send the newer one up.
The cloud is newer	The cloud copy was played somewhere else since.	Bring the newer one here. Leave the world first if it is open.
Played in both places	The world was played on two devices since they last matched.	Choose which to keep.

Use Delete from the cloud to remove a world from your cloud. The copy on this device, if there is one, stays where it is. Each delete asks you to confirm with a second click.

When a world was played in two places

Nothing is replaced until you decide. The tab shows both copies side by side, with how many blocks each has changed and when each was last played. The one played last is suggested. You can:

Keep this device's world, which replaces the one in the cloud.
Keep the cloud's world. This device's copy is backed up first.
Keep both, so the cloud's world comes to this device as a copy.
Not now, which changes nothing.

Limits

The cloud keeps up to 20 worlds for each player.
Each world can be up to 16 MB once packed.
Your cloud holds 128 MB in all. The tab shows how much is used.

A world is packed small before it is sent. If a world is too big or the cloud is full, the tab says so in a sentence, and nothing else changes. Delete a world in the cloud to make room.

The Keep worlds that are in the cloud up to date by themselves tick box sends a world up when you pause or leave, at most every couple of minutes.

Settings that follow you

Your settings can follow you too, from the same tab. These are how you play, see and hear: view, controls and keys, sound, accessibility, your name and colours. Graphics choice, frame rate and the touch layout stay with each device, because each device has its own screen and hardware (see Settings and graphics).

The Settings part of the tab says whether the cloud's settings are in step with this device. You can Use the cloud's settings here, or Replace the cloud settings with mine, which asks you to confirm.

Offline and blocked

If you are offline, or the game is running from a file rather than from the website, the tab says why. Worlds on this device are safe in that case, and Export still works. Nothing is lost while you are offline; the cloud simply catches up later.

For the worlds kept on each device, see Saving and worlds.

← Back to the wiki · Last updated 25 October 2026. Mantlenaut is in alpha, so things change.