Quick Answer
Find The Needle has no official multiplayer, but an unofficial co-op mod by AleDev11 lets friends dig the same haystack in the free demo. Players share money, the tech tree and buildings, and connect through Steam invites over Steam's relay network, so no port forwarding is needed.
The mod is free and MIT licensed, and is published on GitHub and Nexus Mods. It is not made or supported by Needless Games, so expect bugs and re-installs after game updates. Below is what it does, how to set it up and its limits.
What the Co-op Mod Shares Between Players
According to the mod's README, the host and guests see one shared world. These parts are kept in sync:
- The haystack itself and the needles inside it.
- Buildings, belts and machines.
- Money and the tech tree.
- Loose items, player positions and the tools players hold.
Requirements Before You Start
Every player needs the same mod version. Mismatched versions are the most common reason a guest cannot join.
- The free Find The Needle demo on Steam, build V26 or newer.
- Windows 64-bit. The game has no Mac build, see our Mac guide.
- The game launched from Steam, or invites will not work.
How to Install the Co-op Mod
Back up your saves first. Our mod installation guide explains where they live. Then follow the steps from the mod's README:
- Download the zip from the mod's Releases page and unzip it.
- Copy the mods folder next to FindTheNeedle.exe.
- Open override.cfg in that folder and add the [autoload] section with the MPMod line, or run tools/install-helper.bat to do it for you.
- Launch the game from Steam. A MULTIPLAYER entry appears in the main menu.
How to Host and Join a Co-op Game
The host picks MULTIPLAYER, then CREATE GAME, then INVITE FRIENDS, and starts or loads a save. Guests accept the Steam invite. If a guest's game is closed, Steam starts it and brings them in.
A direct IP option is under IP connection (advanced) if Steam invites fail. In game, F2 opens the panel, Y opens chat and F8 forces a resync when things drift apart.
Known Limits and Catches
The mod is a fan project, and the README lists several limits worth knowing before you invite friends:
- Machines run only on the host. Guests see them but their PCs do not do the work.
- Only the host saves the game.
- Money is shared, but bought tools are per player.
- The online leaderboard is turned off while the mod is loaded.
- Game updates can overwrite override.cfg, so re-add the autoload lines after each update.
Other Multiplayer Mods and Co-op Options
Nexus Mods also lists Find the Needle - Multiplayer Enhanced, which claims co-op for up to 8 players with shared upgrades. As with any mod, every player needs the same mod and game version. Only download mods from the author's own page, never from re-upload sites.
If you want co-op without mods, Find The Needle Together by Smobu is a separate game built for 1 to 4 players. Our multiplayer guide compares the options, and the mods guide covers other community tools.
Frequently Asked Questions
Is there a Find The Needle multiplayer mod?
Yes. An unofficial co-op mod by AleDev11 adds shared multiplayer to the free demo through Steam invites.
Do I need to port forward?
No. The mod uses Steam's relay network. A direct IP mode exists only as a fallback.
Can guests save the game?
No. Only the host saves, so the host should keep backups.
Does co-op work after a game update?
Often you must re-add the autoload lines to override.cfg, and everyone must update to the same mod version.
Sources
Every fact on this page was cross-checked against at least two of these sources. Values that could not be confirmed are left out.