🎮 Game Error Codes What it means & how to fix it

Remnant 2 Can't Join a Friend's Game? Here's the Fix

Most Remnant 2 co-op failures come down to cross-play settings, a strict NAT type, or a version mismatch after a patch. The fastest fix: make sure cross-play is enabled on both accounts, both players are on the same version, and your NAT is Open (UPnP). Then invite through the in-game friends menu rather than searching. Steps below, in order.

Remnant 2 — the Epic-overlay rule most crossplay joins miss

Crossplay invite MUST use Epic overlay
Shift+F3 (Epic) / Shift+Tab (Steam) > right-click friend > Join/Invite — the Steam friends list will NOT work for crossplay
Link accounts first
link Epic + Steam from the main-menu prompt (top-left) before crossplay works
Session must be joinable
host loads a save and sets session to Public or Friends Only
Gotcha
Frame Generation blocks the EOS overlay — if Shift+F3 does nothing, disable frame gen

Last verified: September 2026

Error codes

Failed to join game / connection to host failed The client couldn't connect to your friend's session

Cause: Cross-play disabled, a strict NAT, or a version mismatch after an update.

Fix:
  1. Enable Cross-Play in Settings on both accounts (required for PC<->console and reliable PC joins).
  2. Confirm both players are on the same game version — restart the launcher to pull any pending patch.
  3. Set NAT to Open via UPnP on your router.
  4. Invite through the in-game Friends menu and have the host set the game to Online.
Host is no longer available / session ended The session closed or couldn't be maintained

Cause: Host set to Private/Solo, a dropped connection, or a Gearbox/crossplay service hiccup.

Fix:
  1. Host sets the world to Online and to Friends Only or Public.
  2. Allow Remnant2.exe through Windows Firewall on both PCs.
  3. Both sign out and back in to refresh cross-play, then retry.

Fixes that work for most Remnant 2 errors

  1. Enable Cross-Play in Settings on both accounts — it's needed for most co-op joins, not just cross-platform.
  2. Match versions: restart the launcher so both players are on the same patch before joining.
  3. Set an Open NAT by enabling UPnP on the router.
  4. Allow Remnant2.exe through Windows Firewall and antivirus on both machines.
  5. Host sets the world to Online and Friends Only/Public, then invites via the in-game Friends menu.
  6. Use a wired connection and restart the router to clear NAT issues.
  7. Verify game files if joins fail after an update.

FAQ

Why can't I join my friend in Remnant 2?

Usually cross-play is off, your NAT is strict, or you're on different versions. Enable Cross-Play on both accounts, match the patch, and set an Open NAT via UPnP.

Do I need cross-play on for PC-to-PC Remnant 2 co-op?

It helps reliability — enable Cross-Play in Settings on both accounts even on the same platform, then invite through the in-game Friends menu.

How do I fix 'failed to join game' in Remnant 2?

Match versions, enable cross-play, set an Open NAT with UPnP, allow Remnant2.exe through the firewall, and have the host set the world to Online/Friends Only.

Why does Remnant 2 say the host is no longer available?

The host's session was Private or dropped. Have them set the world to Online and Friends Only/Public, refresh cross-play, and re-invite you.

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