Imperator-class Titan - Notable Emperor Titans: Abominatus, "Despoiler of Worlds" (Imperator-class Titan) - Abominatus of the Legio Magna is one of the most terrifying of all the servants of the Blood God. Abominatus is the hellish union of an Imperator-class Titan and a Greater Daemon of Khorne. When it walks, the ground shakes beneath its steel-shod feet and the enemies of the Blood God quail in fear. This Chaos Titan wields fire and steel against its foes, with flames and gun smoke flickering from each casement and embrasure in its massive body, while its soul burns with the unquenchable fire of a daemon's hate. Abominatus carries a veritable arsenal of weapons built onto its body. Its primary armaments, a Hellstorm Cannon and Plasma Annihilator, along with its main battery function in an identical fashion to its Imperial counterpart. However the weapons on its main fighting platform are quite different. This Chaos-possessed Titan also has a Scorpion Cannon, a lethal multi-barrelled weapon used for close assaults that is normally mounted on Daemon Engines of Khorne. It possesses Manglers, huge battle claws which can sweep aside battle tanks and flay enemy Titans to twisted metal. As Abominatus is part daemon and part machine, this makes it particularly resistant to psychic attack as well.Abyssus Edax (Warmonger-class Titan) - Like the other god-engines of Battle Group Astramax of the Legio Perennia, the Abyssus Edax was newly commissioned and had never seen battle before when it was assigned to be transported to the war zones of the Horus Heresy aboard the super-heavy Mechanicum ark-freighter Omnissiax. Armed with Gatling Blasters and the fearsome Quake Canon, Abyssus Edax was capable of leveling entire city blocks. As lead war engine of Battle Group Astramax, the Abyssus Edax was the main focus of the Traitor Alpha Legion's efforts. Crewed with an Alpha Legion-loyal crew, Abyssus Edax was used with devastating effect by the Traitors to crush the Mechanicum resistance aboard the Omnissiax, firing Abyssus Edax’s weapons inside the ship -- the first such use of a Titan in Imperial history.Aquila Ignis (Imperator-class Titan) - The Aquila Ignis was an Imperator-class Titan of the Legio Mortis, constructed in the Daedalia Forge Yards far to the south of Tharsis on Mars. The Aquila Ignis fought during the Schism of Mars against Loyalist elements from the Legio Tempestus in the battle for Magma City, where it was destroyed in the destruction of that forge city.Axis Mundi (Imperator-class Titan) - The Axis Mundi was an Imperator-class Titan of the unknown Traitor Titan Legion that fought in the Third Battle of Nyrcon, also known as the Titandeath, and was eventually destroyed by the Primarch Sanguinius.Corinthian (Imperator-class Titan) - The Corinthian was an Imperator-class Titan of the Legio Oberon that survived the Word Bearers' treachery on Calth. The Titan was later captured by the Legio Audax during the Shadow Crusade's battle for the city of Meahor.Death Casts Its Own Long Shadow (Imperator-class Titan) - The Death Casts Its Own Long Shadow was an Imperator-class Titan from an unknown Titan Legion, one of eight allied with Roboute Guilliman and drawn from the Forge Worlds of Tigrus and Accatran, that took part in the celebrations after the Dark Angels Legion's arrival at Ultramar in 009.M31.Dies Irae (Imperator-class Titan) - The Dies Irae was an Imperator-class Titan of the Legio Mortis which was attached to the 63rd Expeditionary Fleet under the command of the Warmaster Horus. This infamous Titan was present during the opening days of the Horus Heresy at Istvaan III, when it followed Horus' orders and helped exterminate the remaining Loyalist Astartes of the Traitor Legions present on that cursed world after they were virus-bombed by their comrades from orbit. The Dies Irae was also present during all of the major ground assaults towards the end of the rebellion and helped to breach the walls of the Imperial Palace during the Battle of Terra. The Dies Irae finally met its fate ten millennia later during the siege of Hydra Cordatus in 999.M41 during the 13th Black Crusade when it served as part of an Iron Warriors attack force. When confronted by Imperial Titans from the Collegia Titanica, the Dies Irae was critically damaged after a Loyalist Warlord-class Titan detonated its Plasma Reactor when it was in close proximity to the Traitor Titan, which damaged the ancient Imperator-class Titan's armour. Another Warlord Titan used this opening to penetrate the Dies Irae's Void Shields and compromise its external carapace with its Battle-Claw so that it could crush the Chaos-tainted Titan's own Plasma Reactor. The resulting explosion wiped the Dies Irae 's ancient taint from the face of the galaxy forever.Dominatus (Imperator-class Titan) - The Dominatus was an Imperator-class Titan from an unknown Titan Legion that fell in battle, fighting against the Forces of Chaos during the failed defence of Lorn V. Laying broken and forgotten for millennia, the lost Titan was rediscovered by the Imperium, and the Cadian 412th Regiment, under the command of General Sturnn, was despatched to retrieve it. With the aid of the Eldar Farseer Taldeer of Craftworld Ulthwé and her warhost, who was on Lorn V for her own reasons, General Sturnn's regiment fought their way through both the Chaos Lord Crull's Blood Legion of Khorne warband and the Warboss Gorgutz 'Ead 'Unter's Orks, reaching the fallen Titan before their enemies. Powering up the slumbering God-engine, the Imperial forces were forced to fight the ancient menace known as the Necrons who had begun to emerge from beneath Lorn V's surface. Despite the Farseer's betrayal, Taldeer convinced General Sturnn to aid them against this new threat. They made use of the Dominatus'  powerful weapons to unleash fire into the Necrons' advancing Monoliths, resulting in the undying xenos' defeat. But the ancient Titan's plasma core was ruptured in the process, causing it to explode spectacularly, killing General Sturnn and the majority of the Cadian 412th. The Eldar managed to flee back into the Webway just before it exploded. Those few survivors of the decimated regiment quickly spread word off-world of the treachery of the Eldar Farseer, and their regimental banner now bears a black ribbon to mark their failure to recover the ancient Imperator Titan.Exemplis (Imperator-class Titan) - The Exemplis was the last remaining Imperator Titan of the Legio Ignatum, worshiped by the Adeptus Mechanicus as an avatar of the Omnissiah. The Exemplis saw its last action on the world of Tanakreg against a large Word Bearers warhost commanded by the Dark Apostle Jarulek. Despite the horrendous casualties it inflicted upon the Heretics, the Chaos Space Marines managed to board and destroy the Exemplis after attacking its more vulnerable components.Ijax Ijastus (Imperator-class Titan) - The Ijax Ijastus was an Imperator-class Titan from an unknown Titan Legion, one of eight allied with Roboute Guilliman that was drawn from the Forge Worlds of Tigrus and Accatran and took part in the celebrations after the Dark Angels Legion's arrival at Ultramar in 009.M31.Immortalis Domitor (Warmonger-class Titan) - The Immortalis Domitor was a Warmonger-class Titan of the Legio Praesagius that took part in the Battle of Calth in 007.M31. The Immortalis Domitor fought with endless hordes of daemons until its destruction.Imperious Cathedra (Imperator-class Titan) - An Imperator-class Titan of the Legio Victorum, particularly notable for being one of the few of these avatars of the Machine God which completed construction during the Horus Heresy. The Imperious Cathedra was still in the process of creation when open hostilities broke out on the Red Planet, but its forging continued nevertheless. When the Titan's construction finished, it took to the field to assist its Legion and was able to add its immense firepower to their cause. The unrivaled fury of the Imperious Cathedra's ordnance was one of the reasons for the Legio Victorum's eventual survival.Imperious Corporalis (Imperator-class Titan) - The Imperious Corporailis was an Imperator-class Titan that fought in the Sabbat Worlds Crusade.Imperious Prima (Warmonger-class Titan) - The Imperious Prima was a Warmonger-class Titan of the Legio Ignatum dating from before the foundation of the Imperium. The Imperious Prima was involved in the valiant defence of the Imperial Palace during the Siege of Terra.Magnificum Incendius (Imperator-class Titan) - The Magnificum Incendius was an Imperator-class Titan of the Legio Ignatum under the command of Princeps Bazzanius that served as part of Terra's defences during the Horus Heresy.Magna Bellifica (Imperator-class Titan) - The Magna Bellifica was an Imperator-class Titan of the Legio Astorum that fought in the Third Battle of Nyrcon, also known as the "Titandeath."Magnus Casei (Imperator-class Titan) - Originally belonging to the Legio Vindictus, the Titan Legion detached to the protection of the Raven Guard's home system of Kiavahr, Magnus Casei was in fact controlled by one of the seditious sub-cults within the Mechanicum called the Order of the Dragon. During the early years of the Horus Heresy, Magnus Casei’s treachery was the initial spark that marked the beginning of the insurrectionist uprising on Kiavahr. The rebels attempted to profit from the depleted state of the Raven Guard Legion to secede from the Imperium and quite possibly join Horus' cause. As was only be discovered later, the entire insurrection had been but a diversion to allow one of the Alpha Legion's twin Primarchs, Omegon, to infiltrate the Ravendelve complex and steal the highly valuable Primarch gene-seed template given to Corvus Corax by the Emperor Himself.Mettalum Olympus (Imperator-class Titan) - The Mettalum Olympus was a notable Imperator Titan commanded by Princeps Goethe which managed to almost single-handedly hold off a Tyranid invasion on the ash-choked plains of Horst Prime. Surrounded by an entire horde of Hierophant Bio-Titans, the ancient Titan met its end when the Tyranids managed to breach its Plasma Reactor. The resulting explosion vapourised everything within a kilometre, leaving a crater that is still visible from orbit.Omnia Victrum (Imperator-class Titan) - The Omnia Victrum was an Imperator-class Titan of the Legio Argentum that was destroyed during the Fall of Lesser Damantyne, when Barabas Dantioch's Loyalists detonated the Schadenhold citadel.Paragon of Terra (Imperator-class Titan) - The Paragon of Terra was an Imperator-class Titan of the Legio Crucius under the command of the Princeps Magnus Etana Kalonice, and served as the key element of the Loyalists' defence during the Battle of Molech. The Paragon of Terra was destroyed by treacherous Renegade Knights of House Devine.Praeco Deictus (Imperator-class Titan) - The Praeco Deictus was an Imperator Titan of the Legio Crucius which had survived the grim days of the Horus Heresy and had won countless victories on thousands of worlds for the Imperium. The Praeco Deictus was destroyed, along with other Titans of the Legio Crucius, defending the Hive World of Kado from the Forces of Chaos. During the fighting, a hundred Slaaneshi Renegade Knights infiltrated the main hive city and emerged to attack the Imperator Titan from the rear where it was most vulnerable, turning it into a pile of molten slag.Stormherald (Imperator-class Titan) - The Stormherald was one of the few Imperator-class Titans in the Legio Invigilata and the God-engine of Princeps Majoris Zarha Mancion during the Third War for Armageddon and the Battle of Helsreach. The Stormherald 's Machine Spirit (artificial intelligence) was resentful at being bound to its Princeps, and during the years of their enforced cooperation it had patiently weakened Mancion's mental resolve, seeking to finally drown her in its mindscape -- an effort only made easier as she aged. The Titan's efforts caused Mancion to not be in complete control of her thoughts, the flood of the Titan's mental gestalt making her undertake brazen actions. At one point during the Battle of Helsreach, the Stormherald nearly succeeded in overthrowing her will -- when the Draconian fell to an Ork trap and was destroyed by the xenos, Zarha Mancion was overcome with anger and foolishly strode ahead of her screening Titans and Skitarii fire support seeking vengeance, only to fall to a similar trap moments later. The damage inflicted by the Greenskins and the shame of defeat caused her to loosen her grip on the recalcitrant Titan's Machine Spirit -- and she was very nearly overwhelmed by it. The Titan and its Princeps would have been lost had it not been for the intervention of a Black Templars strike force under the command of the Black Templars Reclusiarch Merek Grimaldus. The Astartes cleansed the God-machine of xenos taint and their Chaplain helped Zarha Mancion emerge from the psychic maelstrom that is a Titan's mental landscape. The Stormherald would continue to participate in the Battle of Helsreach until it was later destroyed by the Ork Gargant Godbreaker.Tantorus Magnificat (Warmonger-class Titan) - The Tantorus Magnificat was a Warmonger-class Titan of the Legio Castigatra that fought with the Legio Audax Battle-Pack Karnassia on the Hive World of Absolom during the Horus Heresy. It was destroyed, but in a final act of defiance its crew overloaded the Titan's Plasma Reactor, annihilating the Tantorus Magnificat and several Traitor Titans alongside it.Terra's Calling (Imperator-class Titan) - The Terra's Calling was an Imperator-class Titan of the Legio Osedax that fought in the Third Battle of Nyrcon, also known as the "Titandeath."Warscorn (Imperator-class Titan) - The Warscorn was an Imperator-class Titan of the Legio Gryphonicus that fought in the Third Battle of Nyrcon, also known as the "Titandeath."