Adds an extra turret to the central hub of the defense system.
The Quad Turrets is an upgrade for the Nod Hub defense systems. Purchasing this upgrade adds an extra turret to the central hub of the defense system. It costs 1,000 credits and is available from the Operations Center.
While Nod's hub based defense systems were proven effective during battles, the vulnerability of the central hub also became apparent. In order to address this glaring weakness, Nod engineers found a simple solution: protect the hub with a fourth turret, analogue to the one of the main system, effectively increasing the power of the defense system by 33% and making the entire system less vulnerable.
In multiplayer, researching Quad turrets will cause a desync and end the match. Intentional use of this error is considered an offence on the C&C:Online server.