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Friends Can't Join

Arrowhead Helldivers 2

Severity: Moderate

What Does This Error Mean?

Friends can't join Helldivers 2 usually because the lobby is set to Invite Only, or NAT type is too strict. Set your lobby to Friends or Public, and open UDP 3478-3479 and TCP 443 on your router.

Affected Models

  • PC (Steam)
  • PlayStation 5

Common Causes

  • Lobby privacy accidentally set to Invite Only
  • NAT type Strict or Moderate blocking peer connections
  • One player on a different matchmaking region
  • Firewall blocking peer-to-peer game ports
  • PSN friend connection failing

How to Fix It