Both players in a co-op session should ensure these exceptions are in place or temporarily disable their firewalls to test the connection. Run as Administrator Right-click the Sniper Elite 3 launcher or executable and select Properties Compatibility tab, check Run this program as an administrator Verify Game Integrity In your Steam library, right-click the game > Properties Installed Files Verify integrity of game files
A "Strict" NAT type is a frequent cause of matchmaking failures. Aim for an Open NAT (Type 1) for the best results. If you cannot change this in your router settings, contact your ISP about obtaining a Static IP . sniper elite 3 connection to the game failed top
However, since you mentioned — if you’re asking whether this error is part of the single-player campaign’s narrative or a story mode feature : Both players in a co-op session should ensure
