Is Project Zomboid Crossplay? Multiplayer Server Options Explained

Project Zomboid has online co-op and Steam lists a “Cross-Platform Multiplayer” feature, but there is no complete, official Steam-to-GOG or PC-to-console compatibility matrix. Treat crossplay outside the explicitly supported client/server route as unconfirmed. Before buying or configuring a server, make sure every player uses the same game build and verify that the server accepts that store and platform.

Godlike.Host offers hosted Project Zomboid servers with its own game panel, SFTP access and free DDoS protection, if you would rather not host it yourself.

For a small group, the in-game Host option is the fastest and simplest choice. A dedicated server keeps the world running when the owner is offline but requires installation, configuration, networking and ongoing maintenance. Managed hosting removes much of that administration in exchange for a recurring fee.

#	Preview	Product	Price
1		Zombicide 2nd Edition Strategy Board Game | Cooperative Game for Teens and Adults | Zombie Board...		Buy on Amazon

As an Amazon Associate I earn from qualifying purchases.

What “crossplay” means in Project Zomboid

Crossplay can mean several different things: players on different PC stores connecting to one server, players on different operating systems joining the same game, or console and PC users sharing a world. Project Zomboid’s Steam metadata includes both Online Co-op and Cross-Platform Multiplayer. That label confirms that the game supports a cross-platform multiplayer capability in some form; it does not identify every store, operating system or console combination that works together.

The official Build 42 rollout was Steam-first. Build 42 was published on Steam’s Unstable branch, with the latest 42.13 build intended for GOG only once it was stable enough and likely hotfixed. The announcement did not state that Steam and GOG clients could already share a server. It also did not publish a PC-to-console compatibility statement.

#1 Best Overall

Zombicide 2nd Edition Strategy Board Game | Cooperative Game for Teens and Adults | Zombie Board Game | Ages 14+ | 1-6 Players | Avg. Playtime 1 Hour | Made by CMON

• UPDATED CLASSIC: Dive into Zombicide: 2nd Edition, the thrilling update to the classic zombie-slaying game. Experience enhanced gameplay and new challenges in the zombie apocalypse.
• COOPERATIVE SURVIVAL: Join forces as Survivors in a world overrun by zombies. Work together to navigate through missions, complete objectives, and fight for survival.
• ADRENALINE-POWERED ACTION: With each zombie kill, increase your Adrenaline Points. Gain strength and skills but attract more zombies with your actions – a double-edged sword.
• INTENSE MISSIONS: Face a series of challenging missions, each requiring strategic planning, teamwork, and bravery. Can you accomplish your objectives while fending off the undead?
• SURVIVE OR BECOME ZOMBIE PREY: The stakes are high - will you emerge as a triumphant survivor or fall victim to the relentless zombie hordes?

Buy on Amazon

Consequently, do not promise Steam/GOG crossplay or PC/console crossplay as a guaranteed feature. The safe rule is to match the exact branch and build, then confirm the server’s supported client path. If a friend bought the game from another store, check that store’s current build number and ask the server administrator which client builds are accepted before everyone installs mods or starts a long-term save.

What is confirmed and what is not

Build 42 multiplayer status and its limitations

The Indie Stone released Build 42 multiplayer on December 11, 2025 as a work in progress for stress testing. Its announcement says, “Multiplayer is WIP and has been released for stress testing.” That status matters more than the feature label: behavior, compatibility and stability can change between Unstable updates.

The same announcement strongly advises players to use whitelisted servers or Steam co-op for the best experience. It also says that having more than 20 players on a server was inadvisable at that stage and that this would be improved later. Finally, it warns that future updates to the Unstable branch will disrupt ongoing multiplayer games. A group planning a persistent world should therefore treat an Unstable save as disposable or maintain tested backups before every update.

Mods during the stress-test period

Official guidance says to disable all mods, including client-side mods, while testing Build 42 multiplayer. Mods can change item definitions, maps, scripts and networking behavior; a server and client with different WorkshopItems or Mods settings can fail to join or corrupt a save. Start a clean vanilla test first. Add a mod only after the server owner has confirmed that the exact version works on the selected build and every player has the same load order.

Multiplayer server options

In-game Host: the quick choice

Choose Host when the same person will usually be online and the group values a five-minute setup over 24-hour availability. The host creates the world and invites or gives the connection details to friends. Because the world runs inside the host’s game session, closing the game or suffering a crash ends that session. The host machine also renders the game while handling server work, so heavy settings, animals, basements, large populations or mods can affect both the host’s frame rate and everyone’s connection.

Steam co-op is the route the developer specifically recommended during the Build 42 stress-test period. It avoids exposing a home server to the internet and minimizes configuration. The trade-off is that players cannot continue without the host and the save remains tied to that host’s machine unless it is deliberately backed up and moved.

Dedicated server: the persistent choice

A dedicated server runs as a separate process or on another computer. It is the better fit when players should be able to join while the owner is away, when the group rents a box, or when the owner wants to keep server CPU and memory separate from a gaming session. It also introduces administration work: matching builds, editing settings, opening ports, monitoring logs and making backups.

How to host a dedicated Project Zomboid server

The official dedicated-server guide documents two installation routes. Use the Steam Tools library on a desktop, or use SteamCMD on a headless machine. The first launch creates the configuration files; the main server settings file is servertest.ini.

1. Pick a machine and branch. Decide whether the server will run on your desktop, a spare computer or a rented Linux/Windows machine. Install the same Project Zomboid branch and build that your players will use. Do not mix a stable client with an Unstable server.
2. Install the server files. In Steam, open the Library, change the filter to Tools, and install Project Zomboid Dedicated Server. For a headless machine, install the files with SteamCMD according to the dedicated-server guide.
3. Launch once to generate configuration. Start the server process and stop it cleanly after it creates its folders and configuration files. This first run is expected to generate the files you will edit.
4. Edit servertest.ini. Set the server name, password, player limit and gameplay options. Keep a copy of the original file so you can identify a bad setting. If you use Workshop content later, coordinate the WorkshopItems and Mods entries exactly with the clients.
5. Configure the network. For internet play, the guide lists UDP port 16261 for the server, 16262 for Steam and 8766 depending on the Steam networking path. Forward only the ports required by your chosen configuration, allow the server executable through the host firewall, and avoid exposing unrelated services.
6. Start and test locally. Run the server, connect from the same network first, and verify that the world loads, the password works and the expected build appears in the log. Fix local firewall or configuration errors before troubleshooting an outside connection.
7. Give players the connection details. In the game, open Multiplayer → Add server, enter a server name, public IP address, port and password, then save the entry. Players must use the same branch, build and mod state.
8. Back up before updates. Copy the world, player-data and configuration folders before changing the branch, applying an Unstable update or changing mods. Future Unstable updates can disrupt an existing multiplayer game.

Common dedicated-server setup failures

• “Connection failed” immediately: check that the server process is running, the address is public and the selected UDP port is forwarded to the correct internal machine.
• Server appears but will not load: compare the client and server build numbers. A branch mismatch is more likely than a password problem.
• Players get kicked after a mod update: remove the mod from both sides, start a clean test, then reinstall one identical version and load order at a time.
• High latency or rubber-banding: test a nearer server region or wired connection and reduce the workload. Player count alone is not the only cause; map activity, animals, basements and scripts also consume resources.
• The world disappeared after a crash: stop the process, restore the latest known-good backup and inspect logs before restarting. Do not overwrite the only copy with a fresh server launch.

Managed server hosting: what to check before renting

A managed Project Zomboid server can be useful when no one wants to leave a home PC running or handle port forwarding and operating-system updates. The provider’s control panel may offer one-click restarts, scheduled backups and a console, but those conveniences do not remove the need to choose a compatible game build.

Compare services using the following checklist rather than a headline player count:

• Does it support the exact Build 42 branch and allow you to pin or roll back a build?
• What player limit is included, and is the limit an administrative cap or a tested performance target?
• Can you edit servertest.ini, WorkshopItems and Mods without opening a support ticket?
• How often are backups made, how long are they retained, and can you download them?
• Are restarts, scheduled maintenance and crash recovery automated?
• Where are the available regions, and how will that location affect your group’s latency?
• What are the recurring price, setup fee, storage limit and cancellation terms?

Do not infer performance from the advertised maximum. A managed server that supports a large nominal player count can still struggle with a heavily modded map or an active animal population.

Build, mod and save compatibility checklist

Before inviting anyone, the administrator should record the exact branch, build number, server settings and mod list. Have each player verify those values rather than relying on “it updated automatically.” Steam updates can replace server files, so the dedicated-server guide recommends updating the server after Steam updates and keeping the client and server aligned.

1. Choose stable or Unstable and announce it to the group.
2. Confirm the same build number on the server and every client.
3. For Build 42 stress testing, disable all mods first, including client-only mods.
4. If mods are reintroduced, match Workshop item IDs, versions, load order and server settings.
5. Back up the save before every branch change, mod change or Unstable update.
6. Test one player on a copy of the world before opening the server to the full group.

Player capacity and hardware expectations

The dedicated-server documentation says Build 42.20.3 improved handling for up to 254 players. That number is a capacity ceiling, not a promise of a smooth 254-player experience. Actual performance depends on the machine, map activity, animals, basements, mods, network conditions and what players are doing simultaneously. The developer’s initial Build 42.13 guidance was much more conservative, advising against more than 20 players during the stress-test period.

Steam’s listed desktop requirements include 8 GB of RAM and 10 GB of storage. For Windows, the listing specifies 64-bit Windows 10 or 11 and a 2.77 GHz quad-core processor; macOS and Linux have separate requirements. These are requirements for running the game client, not a universal sizing rule for a dedicated server. A server that hosts several active players, extensive mods or a large persistent map may need more memory, faster storage and stronger single-thread performance than the minimum client specification.

Which option should your group choose?

Choose Host when

• Two to a few friends normally play at the same time.
• The host is comfortable being the session owner.
• You want the least setup and no router configuration.
• The world does not need to run while the host is away.

Choose a dedicated server when

• The world must remain available between individual play sessions.
• You have a spare machine or are comfortable administering a rented one.
• You need independent server resources, scheduled backups or more control over settings.
• The group can handle build, mod, firewall and update coordination.

Choose managed hosting when

• No player wants to maintain a machine or forward ports.
• You need a persistent world and simple restarts.
• You have compared build support, backups, mod controls, region and total recurring cost.
• You accept that the provider’s advertised capacity is not a guarantee for your particular workload.

Bottom line on Project Zomboid crossplay

Project Zomboid supports online co-op and carries a Steam Cross-Platform Multiplayer label, but the available official Build 42 material does not establish a full Steam/GOG/console compatibility matrix. Use the same build and a verified server route rather than assuming that different stores or consoles can connect. Steam co-op is the safest low-effort starting point for a small group; a dedicated or managed server is the practical route for a persistent world, provided you accept the additional administration and Build 42’s ongoing compatibility risks.

Quick Recap

Bestseller No. 1

Zombicide 2nd Edition Strategy Board Game | Cooperative Game for Teens and Adults | Zombie Board Game | Ages 14+ | 1-6 Players | Avg. Playtime 1 Hour | Made by CMON

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.