The Restrictors (レストリクター, Resutorikutā?) appear in the online multiplayer mode of Dirge of Cerberus -Final Fantasy VII-. They are members of the 14th SOLDIER force, "Lost Force", and the former leaders of the Deepground before Weiss and his Tsviets took over.
Though many are hinted at, only one is ever seen - their leader. He is simply called "The Restrictor" by all those around him. Nobody is sure who or what lies behind that mask, but from the voice it is clearly male. He is voiced by Hikaru Midorikawa. His weapon is two short "gunblades".
The Restrictor leader governed over Deepground, implanting chips into the brain stems of all Deepground recruits so they cannot turn against him. Recruits had to fight to the death to go up in the ranks, until eventually reaching the rank of Tsviet, the highest and most feared. It was the Restrictors who gave the Tsviets their color codes. Nero the Sable was chained up because he was considered too dangerous to be let free. The Player Tsviet in the multiplayer mode is the exception to this, and without knowing, is part of Weiss's plan to take control of the Deepground.
Early on in the game, Azul the Cerulean attempts to attack the Restrictor, but is stopped by the implanted chip inside them which prevents them from attacking the Restrictor. However, during a training exercise, the player is able to grab at the Restrictor's leg, showing how he or she is capable of hurting him.
Later on, Rosso the Crimson feels the need to slaughter countless Deepground soldiers because she wants the chance to see the real sky and outside world, rather than a projection. She takes on the Restrictor. After a short battle, the Restrictor lunges his gunblade into Rosso's stomach, and places a foot on her back as she falls to the ground.
Soon after, Weiss is shown on screen, and is restrained by chains attached to the throne inside Reactor 0. He begins to speak to the Restrictor and tells him that he would like to try out his new swords. After the Restrictor breaks the chains, Weiss takes a hold of his swords, and tells him that he wants to fight him handicapped as he is confident that he is more powerful than the Restrictor. As he does this, the Restrictor calls forth both Azul and Rosso, letting Weiss test his powers against them. Weiss beats them both easily, even while handicapped and with them in their Arch Azul and Bloodburst Rosso forms.
After the battle, Weiss and his Tsviets suddenly turn on the Restrictor. Unable to attack the Restrictor, Weiss orders the player to shoot him. The Restrictor proves powerful, but is defeated by the player. He forces his short gunblade into his or her stomach with incredible strength, and watches as he or she drops to the floor, fatally wounded. Weiss attacks the Restrictor, finally defeating their oppressor.
With the Restrictor dead, the Tsviets are in complete control of Deepground. Thus the stage is set for their move to the world above in the main storyline in Dirge of Cerberus.