Two players sharing an apartment have reported being unable to join the same multiplayer lobby across multiple Call of Duty titles, including Black Ops 2, Black Ops 3, and Modern Warfare 3. Despite standard troubleshooting such as restarting consoles, reinstalling games, and closing background apps, the error "unable to join game session" persists. This issue is specific to Call of Duty games, as other multiplayer titles like Rocket League and Battlefield function normally. The problem suggests a matchmaking or network session bug affecting players on the same local network. Players should be aware this may impact cooperative play from shared locations.
- Issue affects multiple Call of Duty titles including Black Ops 2, 3, and Modern Warfare 3.
- Other multiplayer games on the same network are unaffected, indicating a Call of Duty-specific problem.