How to Fix Aliens Fireteam Elite 2 Cannot Join Game & Multiplayer Connection Errors (2026 Guide)

If you have finally jumped into Aliens: Fireteam Elite 2 with a few friends, only to spend more time staring at a loading screen than shooting Xenomorphs, you are definitely not having the co-op experience you signed up for.

The most annoying multiplayer problems are pretty familiar: “Cannot join game,” “Connection to host lost,” “Game no longer exists,” or an invite that simply seems to do nothing. You click the invitation, the game thinks about it for a moment, and then throws you back into your own session.

It is frustrating, especially in a game built around four-player tactical co-op.

The good news is that these errors do not always mean your internet connection is bad. In my experience with multiplayer shooters, the first instinct is usually to blame the router. That is often the wrong place to start. Mission progression, lobby state, matchmaking settings, firewall rules, and NAT behavior can all interfere with the connection.

Here is a practical troubleshooting guide for Aliens: Fireteam Elite 2 multiplayer connection problems, starting with the fixes that are easiest to try.

Why Aliens: Fireteam Elite 2 Multiplayer Can Fail

The important thing to understand is that a co-op connection is more complicated than simply pressing “Join.”

With a peer-to-peer style setup, one player effectively becomes the host of the session while the other players connect to that instance. That means the connection can fail because of something on the host’s network, something on the joining player’s side, or even because the game does not consider the two players’ current progression and matchmaking states compatible.

I would not start by reinstalling the entire game. That’s a huge time sink and rarely the first thing you should do.

Work through the fixes below.

1. Check Your Campaign Progression First

This is one of those fixes that sounds too simple until you discover that it was the actual problem.

If you and your friends have different campaign progress, the game may not allow everyone to enter the same mission or activity.

Check whether every player has completed the required story steps. If someone recently started the game, they may still have conversations or introductory objectives waiting in the hub.

Before trying another complicated network fix, walk around the hangar and speak to NPCs with obvious quest or dialogue indicators.

This is particularly important after major story milestones. A player who has not completed the required progression can sometimes appear ready for multiplayer while still being restricted from certain activities.

Try This

• Return to the main hangar.
• Check for NPCs with quest or dialogue indicators.
• Complete any outstanding introductory objectives.
• Confirm that everyone has unlocked the mission you are trying to play.
• Let the player with the least campaign progress host the session.

That last trick is worth trying. If the least-progressed player hosts, the group can work forward together instead of asking the game to pull a player into content they have not unlocked.

2. Make Sure Everyone Has the Same Multiplayer Settings

Sometimes multiplayer problems come from settings that seem completely harmless.

Before sending another invitation, have everyone open their multiplayer and gameplay options and compare them.

Pay particular attention to crossplay and matchmaking settings.

If one player has crossplay enabled while another has it disabled, you can run into matchmaking problems depending on how the current lobby is being created.

The simplest approach is to temporarily make the settings identical across the entire squad.

For example:

• Crossplay: Enabled for everyone
• Matchmaking: Public while forming the lobby
• Lobby: Recreated after changing settings

Once everybody is connected, you can experiment with private matchmaking again.

I would also avoid changing multiple settings at the same time. If you suddenly flip five options and the problem disappears, you have no idea which setting actually fixed it.

3. Use the Hangar Lobby Workaround

This is one of the first things I would try when invitations are behaving strangely.

Don’t send invites while one player is already loading into a mission, sitting inside a mission-selection screen, or transitioning between areas.

Instead, get everyone back into their individual hangar instances.

Then:

1. Exit the current lobby completely.
2. Return to the hangar.
3. Make sure both players are idle and not loading anything.
4. Have the host send a fresh invitation.
5. Accept the invitation through the platform’s normal interface.
6. Wait for the connection process to finish before opening another menu.

If that fails, switch hosts.

And don’t underestimate this fix. In peer-hosted multiplayer games, one player’s connection can be perfectly fine for normal browsing and still be terrible as a host.

4. Change the Host

This is my favorite troubleshooting test because it tells you a lot without requiring any complicated configuration.

If Player A cannot connect to Player B, have Player B leave the group and completely restart the lobby.

Then make Player A the host.

If everything suddenly works, you have probably identified a host-side networking problem.

The ideal host should generally have:

• A stable broadband connection
• Strong upload performance
• Low latency
• A wired Ethernet connection if possible
• A moderate or open NAT configuration

Wi-Fi can work perfectly well, of course. But when troubleshooting multiplayer problems, Ethernet removes one potential source of instability.

If one person in the group has noticeably better networking hardware and connection quality, let that person host.

5. Check Windows Firewall

Windows Firewall can occasionally interfere with multiplayer traffic, especially after installing a new game or changing network settings.

If you are playing on PC, check whether Aliens: Fireteam Elite 2 is allowed through Windows Firewall.

Open the Windows Start menu and search for Windows Defender Firewall.

Then:

1. Select Allow an app or feature through Windows Defender Firewall.
2. Click Change settings.
3. Find the game in the application list.
4. Make sure the appropriate network permissions are enabled.
5. If the game is missing, use Allow another app and browse to the game’s executable.

Be careful here. I would not recommend randomly disabling your firewall permanently.

The goal is to create the correct exception, test multiplayer, and then keep your security protection enabled.

Third-party antivirus programs can also interfere with game networking. If you are using a security suite with its own firewall or network protection, check whether the game is being blocked.

6. Verify Your Game Files

A broken update or corrupted local file can create multiplayer problems that look like networking errors.

This is especially worth checking after a patch.

Steam

On Steam, open your Library and find Aliens: Fireteam Elite 2.

Go to:

Properties → Installed Files → Verify integrity of game files

Let Steam finish the scan.

If files are damaged or missing, Steam should replace them automatically.

I would do this before reinstalling the entire game. It is faster and much less painful.

If you are playing through the Xbox app on PC, use the game’s management options and look for the available Verify and Repair function.

After repairing the files, restart the game completely before testing multiplayer again.

7. Check Console Multiplayer Permissions

PlayStation 5 and Xbox Series X|S players have another layer of potential problems: account and privacy settings.

First, confirm that your account has the required multiplayer access.

Then check your privacy settings.

On Xbox, make sure your account allows online multiplayer and communication with other players, including players outside your immediate friends list when necessary.

Cross-network restrictions can be particularly annoying because the game may launch normally and let you access menus while multiplayer invitations fail.

If everything looks correct, perform a full console restart rather than simply returning to the dashboard.

A proper shutdown can clear temporary system states that survive a normal application close.

8. Fix Strict NAT and Router Problems

Now we get to the network fixes.

If the basics have failed, your router may be preventing the game from establishing the required peer connection.

The first thing I would check is NAT type.

A strict NAT configuration can make peer-to-peer multiplayer considerably more difficult because your console or PC may have trouble establishing direct connections with other players.

Enable UPnP

If your router supports Universal Plug and Play (UPnP), make sure it is enabled.

UPnP allows compatible applications to request the network mappings they need automatically.

After changing the setting, restart the router and your gaming device.

Don’t start manually forwarding random ports unless you actually know which ports the game requires. Incorrect port forwarding can create more problems than it solves.

9. Flush Your DNS Cache

This is a quick PC-side fix that costs almost nothing to try.

Open Command Prompt as Administrator and enter:

ipconfig /flushdns

You should receive confirmation that the DNS resolver cache has been cleared.

Restart the game afterward.

A DNS flush is not some magical cure for every multiplayer problem, but if your system has stale or broken DNS information, clearing the cache can remove one more variable from the equation.

10. Disable Your VPN Before Playing

If you use a VPN, turn it off temporarily.

VPNs can change routing, latency, NAT behavior, and the apparent location of your connection. That’s great for some situations, but not necessarily for a game trying to establish a direct multiplayer session.

I’ve seen plenty of multiplayer troubleshooting cases where the game suddenly behaves normally the moment the VPN disappears.

So keep the test simple:

VPN off → restart game → recreate lobby → invite friends.

If that fixes the problem, you have identified the likely source.

Aliens Fireteam Elite 2: 4-Player Co-Op Gameplay, Release Date, and Specialist Class Guide

What I Would Try First

Don’t perform every fix in this article at once. You will just make troubleshooting harder.

If my squad was sitting in the hangar unable to connect, this would be my order:

1. Check everyone’s campaign progression.
2. Return everyone to separate hangar instances.
3. Make sure multiplayer and crossplay settings match.
4. Create a completely new lobby.
5. Switch hosts.
6. Verify game files.
7. Check firewall permissions.
8. Restart the router and check NAT/UPnP.
9. Disable VPN software.
10. Try the connection again after a full game restart.

That order matters. There is no reason to spend 30 minutes messing with router settings if the real problem is that one player has not unlocked the mission.

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Final Thoughts

Aliens: Fireteam Elite 2 is at its best when four players are communicating, covering different angles, and desperately trying to survive a Xenomorph swarm together. Sitting in the hangar fighting an error message is obviously not part of the fantasy.

The good news is that most “Cannot Join Game” and multiplayer connection errors can be approached methodically.

Start with progression and lobby configuration. Then test a different host. After that, move toward Windows Firewall, game-file verification, NAT, UPnP, DNS, and VPN troubleshooting.

And if one particular friend can never join while everyone else connects normally, pay special attention to that player’s network and account configuration. That pattern usually tells you much more than a generic connection error does.

Once the lobby finally works, stop touching the settings and go shoot some Xenomorphs. That’s what we’re here for.

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