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Moon Sweepers co-op: how to find players for a crew

Find Moon Sweepers co-op players through public lobbies, invites, the developer Discord and Steam's discussion board, plus what has to match before a crew starts.

11/3/2026 1.0.5 Last updated: 11/3/2026 3 min read

FAQ

How many players can join one Moon Sweepers world?
Up to 16 players can share an online co-op lobby, and the game is also fully playable solo.
Does Moon Sweepers have matchmaking?
Lobbies are either public, so players you have never met can join, or invite-only, so the crew is limited to people you invited. There is no separate queue to enter.
Can strangers damage your base?
Yes. A public world gives other players access to your Moon and its buildings, which is why patch 1.0.5 added a warning before a crew goes public and why hosts can kick or ban players.

Where do you actually find players?

There are four entry points, and two of them need you to host:

Route What you do Where
Public world Host with the world set to public, then wait for players to join multiplayer rules
Invite-only world Host, then invite people you already know multiplayer rules
Steam General Discussions Post that you are looking for a crew Steam discussions
Developer Discord Ask in DragDrop Games’ server discord.gg/5ATRkXkAAe

The developer Discord is DragDrop Games’ own server. Name your patch version, the hours you play and your region in the post.

A session lives inside a saved world, so whoever hosts carries the world and its progression, and visibility is the setting that decides who can join.

How do you open a public world?

Set the world’s visibility to public when you host. Since 1.0.5, the game asks you to confirm before a crew goes public. Players can then join the session you are already hosting, without an invite.

A public world gives other players access to your buildings. Factory lines have been deleted or misplaced by someone who joined, and the repair had to be done by hand. Keep a public test in a separate save slot from your main base, so a bad session costs one copy instead of the world.

What has to match before the first delivery?

Two things are fixed by the game:

  • One patch version. All crewmates must run the same patch, and saves written in a newer build will not open in an older one. The patch history lists the current build.
  • One Upgrade Matrix. Since 1.0.3 the crew uses the host’s matrix, and anyone’s purchase upgrades it for everyone.

The beginner guide covers the first hour in order if anyone in the crew is new.

Which achievements need another player?

OH You Have Friends? unlocks when you start a game with a friend or more, and it sat at 49.1% in the October 30, 2026 snapshot.

One caution: money and section-clearing achievements can stay locked for a joining player when the host is the one who crosses the threshold. The crew’s shared balance passes the goal, the host’s achievement appears, and the guest’s progress stays empty. The achievement checklist lists which goals are affected.

What do you do when someone damages the base?

Kick or ban them from ESC → Your Crew, then rebuild what was lost. The public game safety guide covers what a joined player can do on your Moon, the 1.0.5 full-refund rule and the rotating backups; the host controls guide shows the roster screen.

Is there a dedicated server or matchmaking queue?

A session is a saved world that is either public or invite-only, and the host’s world carries the shared progression. There is no separate queue to enter.

Game imagery © DragDrop Games.

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