Space Marine II - Recidious Campaign: Yet Titus knew none of this as he lay unconscious in the Apothecarion aboard the Ultramarines battle barge Resilient. At his awakening, Titus was greeted by Chaplain Quintus and was informed that the Ultramarines' Chapter Master Marneus Calgar had ordered that Titus undergo the Rubicon Primaris surgery while he was unconscious, a dangerous process that transformed Firstborn Space Marines like Titus into the larger, faster and stronger Primaris Marines. The Rubicon Primaris had to be crossed because the Apothecaries had determined that only the enhanced physiology provided by the additional Primaris gene-seed organs could save Titus' life.Titus' first impulse upon awakening was to return to his Long Vigil in the Deathwatch but Quintus reminded him that he had been declared free of any Chaos taint by the Inquisition and if he truly yearned for redemption, then he must return to his Chapter and earn back their favour. However, his service in the Deathwatch as a dishonorable Black Shield named "Nullus" who would not reveal his true Chapter or identity would be removed from the Ultramarines' records and much of his past would remain shrouded from his brothers.After re-inducting him into the Ultramarines and having him outfitted in a new suit of Mark X Tacticus Power Armour, Quintus ordered Titus to keep his past a secret and to report to Sevastus Acheran, the new captain of the Ultramarines 2nd Company that Titus had once commanded. Acheran stated that he had reservations about Titus' reinstatement in the Ultramarines, particularly in his old company, but nonetheless provided him with his new rank of lieutenant in the company and command of a squad.Joining Titus were Sergeant Gadriel, the former commander of the squad Titus had been assigned and Brother Chairon, both Primaris Marines, who gradually became suspicious about Titus' past as he continually refused to answer their questions and concerns about his long absence from the Chapter. Neither Space Marine knew anything about Titus' past or that he had once been a captain and hero of the Chapter.Captain Acheran informed Titus that the 2nd Company was currently in the process of a planet-wide evacuation of Kadaku's remaining Human population and ordered him and his squad to aid the Astra Militarum forces on the planet in retaking control of its orbital defence cannons.Fighting through endless waves of Tyranid bioforms, Titus and his squad managed to retake the orbital cannons, allowing the Imperials to destroy one of the Tyranid Hive Ships and buying the Imperial forces time to continue with the evacuation. Titus was then ordered to escort Archmagos Nozick Beta-12 off-world, but the latter refused to leave until important data related to Project Aurora was retrieved from his overrun research facility.After reaching Nozick's facility and completing the data transfer, the Thunderhawk gunship transporting Nozick to the Resilient in orbit mysteriously crashed in territory overrun by the Tyranids. Titus and his squad raced to save Nozick but found the archmagos already dead. Surveying the wreckage, the Ultramarines discovered that Nozick had not been slain by Tyranids but by the forces of Chaos. Before they left the area, a squad of Ultramarines transported a mysterious object from the wreckage whose proximity caused Titus to lose consciousness.After awaking on the battle barge Titus informed Acheran of Nozick's demise and of the presence of Chaos-worshippers on Kadaku despite the concerns of his squad about his health and fitness for service. Acheran ordered Titus to go to the nearby Hive World of Avarax in the Recidious System to retrieve Archmagos Nozick's apprentice, Morias Lueze, who was the only person qualified to continue his master's work on Project Aurora. But first the Ultramarines needed to know where in the vast conurbation of Avarax Lueze was located.Titus and his squad reached an Adeptus Mechanicus facility on Avarax and Titus accessed a cogitator within that provided him with Lueze's location. Suspicious of the mysterious object that had earlier been recovered by the Ultramarines from Nozick's crash site and caused him to lose consciousness, Titus also searched through the cogitator's files and discovered to his horror that Project Aurora was actually an attempt to construct a Warp-based weapon powered by the same Chaos artefact Titus had destroyed over a standard century before on Graia, its remains having been retrieved and reconstructed by the Mechanicus.Returning to the battle barge, Titus confronted Acheran about the artefact. Having experienced the terrible consequences its use on Graia, which had led to a Warp incursion on that Forge World, he demanded that the project be stopped and the artefact destroyed once more, but Acheran refused as the Mechanicus claimed they were working on the project by order of Roboute Guilliman himself.Returning to Avarax to find Lueze, Titus and his squad were ambushed by the Heretic Astartes forces of the Thousand Sons Traitor Legion who were also seeking out Lueze. Fighting their way through the Traitor forces, the Ultramarines managed to reach Leuze's hiding place and escorted him to the battle barge. Along the way, Lueze unwittingly revealed to Gadriel and Chairon that Titus had once been the captain of the Ultramarines' 2nd Company over two standard centuries before and was thought dead after he held the Chaos artefact during Liberation of Graia campaign, further inciting Gadriel's suspicions about and resentment of Titus.After retunring to Acheran, Titus urged the captain to contact Chapter Master Marneus Calgar and warn him about the true nature of Project Aurora. Acheran proved dismissive of the idea, especially since the astropathic relay which would allow them to send an astrotelepathic message to Calgar was currently overrun by the Tyranids and all messages in and out were blocked by the Chaos forces' sorcerous machinations. Titus proposed that he and his squad fight their way to the relay while other squads of the 2nd Company eliminated the Hive Tyrant synapse creature leading the Tyranid swarms and end the forces of Chaos' jamming operation. Acheran agreed to the plan.As Titus and his squadmates fought their way to the relay, the Tyranids they faced suddenly died or become feral, unconnected to the Hive Mind, as a result of their fellow Ultramarines successfully eliminating the Hive Tyrant and the effort of the forces of Chaos to jam all Imperial astropathic communications. Once within the astropathic relay, Titus mets with Astropath Neoma who offered to send a message to Marneus Calgar.As she telepathically sent the message, Neoma suddenly accused Titus of being a Traitor and trying to lure Calgar to the planet to kill him. A suspicious Gadriel attacked Titus as a result but stopped when Chairon suddenly shot Neoma, recognising her as a liar who had been corrupted by Chaos. At her death, her body exploded in a blast of Warp energy that revealed the Thousand Sons Sorcerer Lord Imurah. After a brief duel, Imurah escaped and Titus returned to report to Captain Acheran. Acheran informed Titus that thrall-bands of the Thousand Sons had appeared across the Recidious System and were focusing their assault on Demerium, a local Cemetery World and the new home of Project Aurora, where Lueze was attempting to activate the Warp-based weapon.As the Ultramarines prepared to assault Demerium, Titus and Gadriel made amends, with Gadriel accepting that Titus was a loyal servant of the Emperor. After making planetfall and fighting through the Thousand Sons forces present on the Cemetery World, the Ultramarines arrived at the location of Project Aurora where they discovered that Demerium was actually a Necron Tomb World.The Astartes discovered Lueze, who revealed that by combining Necron and Adeptus Mechanicus technology with the Chaos artefact as a power source, the Project Aurora weapon will allow Imperial forces to negate and banish to the Warp all those touched by the energies of Chaos, first in the Recidious System but eventually the effect will spread across the entire galaxy, providing the Imperium with a final victory over Chaos.Sorcerer Lord Imurah attempted to stop the work on the weapon and was seemingly banished into the Immaterium by Project Aurora. However, this proved a ruse, and as Imurah returned he revealed that it was he who had covertly influenced the Tech-priests of the Adeptus Mechanicus into creating and continuing the project so that he might gain control of the reconstructed artefact. The sorcerer then slew Lueze and stole the artefact for himself.Returning to the surface of Demerium, Titus' squad discovered a Necron obelisk had erupted that had formed a massive Warp rift on the planet's surface, allowing Imurah to bring more of his Thousand Sons forces and a Lord of Change to the Cemetery World. After the squad reunited with Captain Acheran, Gadriel suggested that they might be able to close the Warp rift by shutting down the lesser obelisks empowering the main one.Fighting their way to each of the Necron obelisks, Titus and his squad were nearly overwhelmed by the Thousand Sons before they were saved by the sudden arrival of Marneus Calgar and his Ultramarine reinforcements. Titus and his squad proceed to shut down the lesser obelisks while Calgar and the rest of the Ultramarines distracted Imurah's forces. After shutting down the Warp emanations of the final lesser obelisk, the combined strength of the Ultramarines begin pushing back the forces of Chaos.During the battle, Imurah and the Lord of Change fled through a portal into the Immaterium, unleashing a spell that froze all of the Ultramarines engaged in the battle save Calgar, Titus, Gadriel, and Chairon. Followed by Calgar, Titus and Titus' squadmates, the Ultramarines managed to reunite with Calgar within the Warp and duel Imurah and the Lord of Change. They managed to drive the Lord of Change back as Imurah attempted to use Project Aurora's power source to imbue himself with the divine knowledge of the Warp.However, midway through that process, Titus claimed the Project Aurora power source while Imurah was distracted battling the Chapter Master and reversed the polarity of the power source as Imurah imbued himself with it, causing Imurah to explode with a massive burst of psychic energy when he attempted to channel an amount of Warp energy that was too great for him to handle without the artefact's assistance. The explosion also drove back the Daemonic tide, granting victory to the Ultramarines and the other Imperial defenders.Awakening back in realspace, Titus found himself surrounded by the victorious Ultramarines, now free of the sorcerer's spell. Returning to the battle barge Resilience, Marneus Calgar praised Titus for his deeds and asked that he join him on a mission elsewhere. Titus said farewell to Gadriel and Chairon but was intercepted by Chaplain Quintus, who was also accompanying Calgar on the new mission.Quintus congratulated Titus for having proven himself, but warned him that the risk of corruption by Chaos is ever-present and if Titus were ever to truly falter and betray the Emperor Quintus would not hesitate to execute him. Quintus then removed his Skull Helm and revealed himself to be Brother Leandros, Titus' young protege who had served with him over a century before during the Liberation of Graia and who had originally reported him to the Inquisition for his inability to be affected by the power of the Warp. Titus' redemption had, in truth, been a belated redemption for them both.