How to Fix Co-op Multiplayer Not Working in Warhammer 40000: Space Marine 2

In Warhammer 40000: Space Marine 2, you play as Lieutenant Demetrian Titus.

Engage in brutal third-person combat across planets and use powerful abilities and weapons.

The game features solo and multiplayer modes, including PvE and PvP, with endless replayability.

Customize your Space Marine with skills, perks, and cosmetics with six unique classes.

In this guide, you’ll learn how to fix the co-op multiplayer not working in Warhammer 40000: Space Marine 2.

How to Fix Co-op Multiplayer Not Working in Warhammer 40000: Space Marine 2

Fix 1: Close and relaunch the game

1. Close Warhammer 40000: Space Marine 2.
2. Wait for 1 to 2 minutes and relaunch the game.
3. If you still can’t play co-op, restart your device (e.g. PC, Xbox, PlayStation).

Tip: Try to close and relaunch the game repeatedly until the issue is fixed—this can take multiple attempts.

Fix 2: Connect to a VPN

1. Download a free VPN provider like ProtonVPN.
2. Select “Get Proton Free” and “Continue with free”.
3. Create a ProtonVPN account.
4. Download ProtonVPN, open it, and log in.
5. Connect to a free VPN (e.g. US, UK, Japan).

Fix 3: Turn off crossplay

1. Launch Warhammer 40000: Space Marine 2.
2. Go to your game settings.
3. Turn off “Crossplay”.

Fix 4: Turn off Steam Overlay and Cloud Saves

1. Open Steam and go to your library.
2. Right-click Warhammer 40000: Space Marine 2 and select “Properties”.
3. Turn off “Enable the Steam Overlay while in-game”.
4. Turn off “Steam Cloud”.

Fix 5: Switch game mode

1. If you can’t enter your friend’s game, ask them to switch their session to another mode.
2. You can ask them to switch to any mode (e.g. Operation, PVP) and try to join them.
3. After you’ve entered any mode (e.g. Operation, PVP), try getting back to campaign or any other mode you want to play.

Fix 6: Invite players using a game code

1. If you can’t find a co-op match, you can invite players using a game code.
2. To do so, simply share your invite code with other players and ask them to join.

Fix 7: Set date and time automatically

1. Search for “Date & Time Settings” using Windows Search and press Enter.
2. Turn on “Set time zone automatically”.
3. Turn on “Set time automatically”.

Further reading

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How to Fix Dev Error 10493 in Black Ops 6