Phasmophobia cover

Phasmophobia multiplayer not working? Fix it here.

4-player online co-op ghost-hunting on Steam & VR.

SteamVR4 playersCrossplay ✓
Co-op type
online
Invite method
In-game Friends list or lobby code
NAT needed
Moderate or Open
Ports
Steam P2P: UDP 27015–27030 · Steam datagram relay: UDP 3478 / 4379 / 4380

Crossplay: Steam and VR players share lobbies automatically; there is no console crossplay.

What's happening? Pick your symptom

All Phasmophobia co-op fix guides

Can't join friends in Phasmophobia

Phasmophobia's Steam-overlay invites fail more than its in-game Friends list. Host the lobby in-game first.

  1. Restart Steam / Epic / the console client — The overlay and friend-presence service occasionally desyncs, so invites never arrive. A client restart re-syncs it.
    • Fully quit Steam/Epic (system tray → Exit, don't just close the window).
    • Reopen and log back in.
    • On console, quit to dashboard and restart the app.
  2. Check and fix your NAT type — Strict NAT is the #1 cause of 'can't join friends'. You need Moderate or Open to host and to receive invites reliably.
    • On Steam: Settings → In-Game → check the 'NAT' indicator, or test via Steam's network settings.
    • On Xbox: Settings → General → Network settings → 'NAT type'.
    • On PlayStation: Settings → Network → View Connection Status → 'NAT Type'.
    • If Strict: enable UPnP and/or port-forward (see those fixes). Tether to a phone hotspot once to confirm — if it works there, the issue is your home router.
  3. Use the lobby / join code instead of a friend invite — Steam and platform friend-invites fail far more often than copy-paste codes. Most co-op games have a 'share lobby code' button.
    • Host creates the lobby, then copies the lobby/join code (not the friend invite).
    • Send the code in chat; the joiner pastes it into 'Join with code'.
    • If invites still fail, this bypasses the broken invite pipeline entirely.
  4. Make sure everyone is on the same version & region — Even a one-patch difference blocks joins. Test branches, beta opt-ins, and region settings must all match.
    • Confirm all players are on the same game version (no one on a beta/test branch).
    • Match region/server selection in the game's settings.
    • If one player is on Steam and another on a different store, check the crossplay note on the game's page.
  5. Host creates the lobby in-game, then friends join via the in-game Friends list — don't rely on the Steam overlay invite popup.
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Phasmophobia multiplayer not working

Most 'multiplayer not working' reports are actually NAT or invite-pipeline failures.

  1. Power-cycle your router and relaunch the game — A 30-second router reboot clears stale NAT and UPnP leases that silently break peer-to-peer connections. Fully quit the game (don't just minimise) and reopen it.
    • Unplug the router for 30 seconds, then plug it back in and wait for full sync.
    • Completely close the game (check Task Manager / Force Quit — overlays can leave it running).
    • Relaunch the game and try joining again.
  2. Enable UPnP on your router — UPnP lets the game open its own port automatically. With it off, you'll often get Strict NAT and can't host or receive invites.
    • Log in to your router admin page (usually 192.168.0.1 or 192.168.1.1).
    • Find 'UPnP' or 'Universal Plug and Play' and turn it ON.
    • Save and reboot the router, then retry the game.
  3. Check and fix your NAT type — Strict NAT is the #1 cause of 'can't join friends'. You need Moderate or Open to host and to receive invites reliably.
    • On Steam: Settings → In-Game → check the 'NAT' indicator, or test via Steam's network settings.
    • On Xbox: Settings → General → Network settings → 'NAT type'.
    • On PlayStation: Settings → Network → View Connection Status → 'NAT Type'.
    • If Strict: enable UPnP and/or port-forward (see those fixes). Tether to a phone hotspot once to confirm — if it works there, the issue is your home router.
  4. Turn off VPN, proxy, and 'kill switch' tools — VPNs and routing tools reroute P2P traffic and trigger Strict NAT or total blocks. Disable them for the session.
    • Fully quit your VPN app (not just disconnect — quit it).
    • Disable any proxy in Windows Settings → Network → Proxy.
    • Temporarily uninstall 'kill switch' / firewall-overlay tools if the issue persists.
    • Retry the join with a direct connection.
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Phasmophobia connection failed / keeps dropping

Drops right after join are usually a firewall silently killing the voice/data socket.

  1. Allow the game through firewall & antivirus — Over-aggressive security software flags game executables as threats and drops the connection after join.
    • Windows: Allow the game .exe through Windows Defender Firewall (Private + Public).
    • Add the game and Steam/Epic to your antivirus allow-list.
    • On Mac: System Settings → Privacy & Security → Firewall → allow the game.
  2. Use a wired connection to stop lag & drops — Wi-Fi jitter causes 'connection failed' and mid-session drops. A cable removes most of it.
    • Plug in Ethernet instead of Wi-Fi for the host especially.
    • If Wi-Fi only, move close to the router and use 5 GHz.
    • Close bandwidth-heavy apps (streaming, downloads) during play.
  3. Verify game files (fixes corrupted installs) — A half-downloaded or corrupted file causes 'connection failed' right after joining. Verifying redownloads the broken bits.
    • Steam: Library → right-click game → Properties → Installed Files → 'Verify integrity of game files'.
    • Epic: Library → three dots → 'Manage' → 'Verify'.
    • Console: a corrupted install usually needs a full reinstall from the store.
  4. Check and fix your NAT type — Strict NAT is the #1 cause of 'can't join friends'. You need Moderate or Open to host and to receive invites reliably.
    • On Steam: Settings → In-Game → check the 'NAT' indicator, or test via Steam's network settings.
    • On Xbox: Settings → General → Network settings → 'NAT type'.
    • On PlayStation: Settings → Network → View Connection Status → 'NAT Type'.
    • If Strict: enable UPnP and/or port-forward (see those fixes). Tether to a phone hotspot once to confirm — if it works there, the issue is your home router.
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Phasmophobia error codes explained

DISCONNECTED
Lost connection to host — almost always Strict NAT or a firewall on the joiner's side.
FAILED TO CONNECT
Host's lobby isn't reachable; ask the host to check NAT/UPnP and re-share the lobby code.