Re5 Online Fix ((free)) Guide

Have both players verify their game files (Right-click RE5 > Properties > Local Files > Verify integrity). 90% of "Failed to join" errors are fixed by simply restarting Steam and disabling Windows Firewall temporarily.

However, the combination of works for 98% of players. If you are part of the 2% still unable to connect, consider using Steam Remote Play Together as a nuclear option. It is not true local co-op (Player 2 streams the screen), but it bypasses RE5's netcode entirely. re5 online fix