Background Dirge of Cerberus centers on Vincent Valentine, who is the main playable character, although
Cait Sith is playable for a single level. The game's main
antagonists are the members of the organization
Deepground, who plan to use the creature Omega to destroy the Planet's life. Their highest-ranking members are known as the Tsviets, and their leader is Weiss the Immaculate. The second highest-ranking member is Weiss' brother, Nero the Sable, who leads Deepground in the field. Other members of the Tsviets include Rosso the Crimson, Shelke the Transparent and Azul the Cerulean. The
online mode of the game, which is only available in the Japanese version, also introduces a group called the Restrictors, who were the former leaders of Deepground before Weiss took over. The Restrictors' leader implanted
microchips into the
brainstems of all Deepground soldiers to ensure they never turn against the group. However, Weiss was able to overcome this control method, and the Tsviets wrenched control from the Restrictors. Although Weiss was successful in overthrowing the Restrictors, the leader of the Restrictors was able to implant a virus into Weiss' bloodstream.
Story The game begins during the climax of
Final Fantasy VII. As Vincent and
Yuffie Kisaragi help to evacuate
Midgar, which is about to be destroyed by
Sephiroth's Meteor spell, Vincent finds the body of
Professor Hojo slumped at the controls of the Sister Ray cannon. After a flash of lightning, Hojo's body seemingly disappears, and before Vincent can investigate, the cannon explodes, forcing Vincent to escape with Yuffie. Three years later, Vincent is in the town of Kalm when it is attacked by a group of mysterious soldiers. Vincent, with help from his former comrade,
Reeve Tuesti of the
World Regenesis Organization (WRO), an organization dedicated to helping the planet recover from the events of
Final Fantasy VII, fights the soldiers and forces them to retreat, but many citizens are captured or killed. Reeve explains to Vincent that the soldiers were members of Deepground, a military organization created as part of a covert
Shinra operation to create
genetically enhanced super soldiers. Vincent soon learns that he is one of Deepground's primary targets, as he is unknowingly in possession of "Protomateria". It is a substance which he uses to control the "Chaos" gene within him, and which Deepground claims they need to control "Omega". According to ancient tablets discovered years ago, Chaos and Omega have an unknown but important relationship, with Chaos described as being "Omega's squire to the lofty heavens". The Chaos gene was injected into Vincent over thirty years ago by the scientist
Lucrecia Crescent, Hojo's research assistant, whom Vincent was in love with. In an effort to find answers, Vincent goes to the town of Nibelheim, where Lucrecia studied Omega and Chaos. While at Lucrecia's research lab, Vincent is ambushed by Rosso the Crimson, who steals the Protomateria but is prevented from killing Vincent by the arrival of Yuffie. As they return to the WRO headquarters, they find that Deepground has launched an assault on the base. However, Deepground member Shelke the Transparent has been captured by the WRO, and reveals that she is synaptically interconnected to Lucrecia's memories, allowing the WRO to complete Lucrecia's research on Omega. Shelke's sister,
Shalua Rui, a high-ranking scientist in the WRO, soon discovers that Omega is a
WEAPON, which activates when the Planet senses that it is in mortal danger. Omega's function is to absorb the
Lifestream from the Planet and then move to another planet, leaving the inhabitants behind to die. Deepground plans to slaughter a huge number of people at once so as to 'trick' the planet into activating Omega prematurely. Vincent and the WRO launch a full-scale assault on Deepground's headquarters in Midgar. While Reeve's team battles the Deepground soldiers and attempt to destroy the Mako reactors which serve as a means to revive Omega, Vincent heads to Deepground's center of operations to confront Weiss. He is surprised to find Weiss slumped in his chair, dead. However, as Omega begins to manifest itself, Weiss seemingly revives and confronts Vincent. It is revealed that Weiss is possessed by Hojo; before Hojo was killed in the Mako Cannon three years earlier, he uploaded his consciousness into the Worldwide Network, then took possession of Weiss's body while he was online attempting to find a cure for the virus the Restrictors had infected him with. Hojo/Weiss and Vincent battle to a standstill. However Nero, who had been defeated earlier by Vincent, emerges from the Lifestream and destroys Hojo. Nero then merges with Weiss to help him fuse with Omega, just as Vincent is fused with Chaos. While the WRO continues to fight the remnants of Deepground, Vincent transforms into Chaos in a desperate attempt to defeat Omega Weiss. Shelke dives inside Omega to find Lucrecia's Protomateria, and upon finding it, she gives it to Vincent, telling him that his survival made Lucrecia happy. Vincent then takes control of Chaos and battles Omega. Omega sprouts wings and tries to ascend from the planet, but Vincent manages to destroy it, disappearing in the process. A week later, he is seen visiting Lucrecia's crystalline tomb in the Crystal Cave. He states that both Chaos and Omega have returned to the Planet, and thanks Lucrecia for being the reason he survived. He is then found by Shelke outside the cave, and she tells him that everyone else is waiting for him. In the secret ending of the game, "
G", a legendary warrior with unexplained connections to Deepground, awakes beneath the ruins of Midgar. He finds Weiss's body and picks it up, telling him "It is not yet time for slumber. We still have much work to do... My brother". He then sprouts a large black wing and flies into the night, carrying Weiss with him.
Crisis Core Ultimania explains that "G" (Genesis) returned from his three-year slumber to protect the Planet. ==Development==