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The Lambent Pandemic was the infection of the surface of Sera by the Imulsion parasite. Initially, the Lambent only consisted of Locust that had become infected and mutated through exposure to Imulsion, but it soon spread to infect surface creatures as well as humans. This new threat forced the COG to ally with the Stranded to fight against both the Lambent and the remnant of the Locust Horde, which resulted in a three-way war for control of Sera.

The Lambent first reached the surface of Sera in the middle of the ocean. A Gorasni frigate was sunk by stalks, followed by a freighter and two trawlers. Following the destruction of the Emerald Spar Imulsion Platform, the Lambent began moving towards Vectes Island and New Jacinto. The Pandemic eventually spread over all of Sera before the Imulsion Countermeasure Weapon destroyed all Imulsion and everything infected by it, including all Lambent lifeforms.



The Lambent Pandemic occurred to humans around the early years of the Pendulum Wars. The COG discovered that Imulsion had mutagenic and teratogenic effects on Humans after long exposure but early effects are known as an illness called Rust Lung. After building the New Hope Research Facility, the COG and Department of Health wished to find a cure and keep the effects in secret. However, the effects led to the creation of poisoned, mutant humans known as Sires and information leaked out of office. New Hope was shut down, but Doctor Niles Samson and his research were moved to a secret laboratory at Mount Kadar where his continuing experiments resulted in the creation of the Locust Horde.[3]

Classified MattersEdit

Though the New Hope Research Facility was shut down, Imulsion research did not stop but was merely relocated. In the early years of the Pendulum Wars, the COG built a resort bunker on the remote island of Azura. The bunker was designed as an evacuation point for COG leadership, scientists, and high-profile citizens in the event of a global catastrophe. Late in the Pendulum Wars, the COG began forcibly moving scientists to Azura, whilst telling the public that the kidnapped scientists had died.

17 years before Emergence Day, Morphologist Dr. Elain Fenix, while exploring a Hollow cave, found a dead Rock Shrew that inexplicably had an extra, vestigial, pair of legs. Believing she had discovered the last remaining member of a genus long thought extinct, Elain inferred that mutated shrew was, in fact, a genetic relative of a six-legged creature from a children's bedtime story. Though her husband, Dr. Adam Fenix, thought the legs were merely a random mutation, Elain was ardent in her belief that the shrew was related to the long extinct creature, and had the research data to back up her claim. What Elain could not have possibly known at the time was that the creature she had discovered was, in fact, suffering from Imulsion infection and the mutations were a sign of Lambency.

Though this was humanity's first publicly known encounter with Lambency, the creatures in the Hollow, including the Locust Horde, were subject to the effects of extreme Imulsion exposure for much longer. At least 9 years before Emergence Day, Lambent creatures had organized themselves to such an extent that they were able to fight the Locust on at least even terms, marking the beginning of the Lambent War. When Elain returned to the Hollow eight years later to follow up on her discovery, the Locust leader, Queen Myrrah, had her executed to prevent a premature human discovery of the Locust. Four years later, Adam, following his late wife's journals, traced her body to the Hollow where he too crossed paths with the Locust. While there, he discovered the true extent of the Lambent threat and found out about Queen Myrrah's plans to leave the Hollow and colonize the surface at the expense of Humanity. Trying to prevent a war between humans and the Locust, Adam met with Myrrah some five years before Emergence Day and assured Myrrah that he had the expertise and resources necessary to find a cure for Lambency. All she needed to do was give him the time to find it. Myrrah gave Adam five years to find a cure, but after repeated failures, the Queen's patience finally ran out. The Locust enacted their plan to leave the Hollow, resulting in the start of the Locust War.

Throughout the course of the Locust War, Chairmen Tomas Dalyell and Richard Prescott continued the pre-Emergence Day policy of moving key scientists and research personnel to Azura. When the COG learned Adam had known about the Locust and the Lambent years before E-Day, Prescott evacuated him and his assistant to Azura in an attempt to discover a way to destroy Lambency. Adam brought with him a sample of Imulsion and the remains of the Rock Shrew Elain had found years earlier. Desperate to find a cure, Adam injected himself with Imulsion, and discovered its true nature; that Imulsion was, in fact, a parasitic fungus-like lifeform. Adam also determined that, in as little as a few years, Imulsion would destroy or infect all other forms of life on the planet. After numerous attempts to cure the infection via traditional methods failed, Dr. Fenix developed the Imulsion Countermeasure Weapon which killed Lambent cells using a wave of targeted radiation that would envelop the entire planet. Unfortunately, Adam did not have the time to fine tune the weapon, meaning that it would also kill any creature that had been heavily exposed to Imulsion even if it was not fully Lambent yet. This included the entirety of the remaining Locust Horde.

Locust-Human WarEdit

As early as the first month after Emergence Day, COG Soldiers and Officials spotted Wretches that appear to glow a golden color and are volatile even after death. Once was said rumor in the COG during the Battle of Halvo Bay became real. The COG was then forced to inform Gears of the glowing Wretches and their dangers.

14 years after E-Day, the COG began the Lightmass Offensive by building the Resonator to map out the Locust tunnels and destroy them with the Lightmass Bomb. When Delta Squad was ordered to infiltrate the Lethia Imulsion Facility to plant the Resonator, Sgt. Marcus Fenix, Pvt. Dominic Santiago, Augustus Cole, and Damon Baird reported to Command the glowing Wretches in the courtyard of the facility. Command warned them that Lambent Wretches have been reported and they explode on command or when killed. Delta Squad had to clear the Lambent Wretches in the facility and the Outer Hollows to plant the Resonator.

Since the Resonator failed, Delta Squad downloaded the mapping data from Haldane Hall which was used to put into the Lightmass Bomb on the train delivering it to the Hollows. Along the way, Lambent Wretches boarded the train and attempted to cut the train's power and disconnect the rest of the train.

Delta was successful in defeating both the Lambent Wretches and General RAAM and bombing the Outer Hollows. However, the Lightmass Bomb proved more of a disadvantage to the Humans and the Locust. Because Lambency spreads through Imulsion fumes, a majority of the Imulsion in the Outer Hollows evaporated into the atmosphere. It spread into the Inner Hollows and created more numbers for the Lambent Army trying to overthrow Nexus. For the Humans, the Lightmass Bomb brought back what became the beginning of the Pandemic, Rust Lung.

Rustlung ReturnsEdit

Unfortunately for the survivors and soldiers stationed near Timgad and other Imulsion Townships, the Lightmass Bomb caused the return of Rust Lung. Cases were reported in civilians of Timgad and soldiers stationed there, including Jonathan Harper and Michael Barrick. The Rust Lung spread as time went on, eventually infecting every Human on Sera around 17 A.E.

Eventually, Rust Lung patients were geared up along with healthy soldiers to fight in Operation: Hollow Storm.

Operation: Hollow StormEdit

Due to the Lightmass Bomb awakening the Riftworm and realizing the danger of Jacinto sinking, the COG ordered nearly every able-bodied men to dig into the Hollow and destroy the Locust. In the midst of the first wave, Prescott realized the only true way to locate Nexus and Queen Myrrah would be to trace their steps back from the New Hope Research Facility where they first studied Lambency and created the Locust Horde. Prescott "declassified" the disk and ordered Delta to investigate the facility for any leads on the Locust stronghold and their Queen.

Upon entering the facility and going through "clearance," Delta came across the abandoned facility and the security system based on the personality of Dr. Niles Samson. While Delta traversed the facility, they finally found the intel leading them to Nexus through Mount Kadar via recorded message, the last message about the children. However, doing this awoke the Sires, the Lambent Humans, which attacked Delta. Delta escaped, killing most if not all of the Sires, and managed to reach Nexus, the Locust capital.

When Delta planted the beacon and began the second wave of Hollow Storm in Nexus, the COG came across a horrible truth. Upon invading the main tower, Delta discovered that the Locust were fighting with their Lambent brethren. At the same time that the COG invaded Nexus from above, the Lambent were attacking from below, coincidentally weakening the stronghold's defences and making it easier for the COG. They eventually discovered how the Lambent are what caused the Locust to emerge and attack on E-Day. Queen Myrrah wished to invade and conquer the surface while she leaving the Lambent in the Hollows. But she began following an old plan made by Adam Fenix to evacuate the Locust Horde to the surface and sink Jacinto City which would drown the Lambent in the flooded Hollows. She was unsuccessful as the Humans sank Jacinto first which caused a majority of the Locust to die while the water rose the Imulsion into the soil and the ocean, accelerating the Lambent Pandemic.

Ocean AttacksEdit

The Lambent were responsible for apparently anonymous attacks on fishing vessels around Pelruan. Among the vessels, the Lambent sunk was a UIR frigate. Evidence of Lambent stalks was found aboard one vessel - a stalk had punched straight through the hull and released Polyps. Marcus Fenix, accompanied by Bernadette Mataki, encountered what seemed to be a Drudge aboard a fishing vessel; it mutated multiple tentacles and exploded when killed.

Attack on Emerald SparEdit

Main article: Battle of the Emerald Spar Platform

Delta discovered the Lambent Stalks heading towards the Emerald Spar Imulsion Platform and quickly headed there to defend it. Two stalks ended up punching up through the well bay of the platform and released hundreds to thousands of polyps. In the battle that followed, one of the stalks was destroyed by KR-239, but the platform caught on fire and was eventually abandoned. The platform ended up collapsing into the ocean while the Lambent seemed to retreat as there was no sign of the remaining stalk afterwards. This deprived the COG of their only source of Imulsion.

Assault on VectesEdit

First Battle of New JacintoEdit

Main article: First Battle of New Jacinto

Preparing for an invasion of Vectes by Lambent Stalks, the COG was surprised when three Lambent Leviathans attacked the island with two heading to New Jacinto and one smaller one heading to Pelruan. The Leviathans unleashed hundreds of polyps that the defending forces were forced to battle. The polyps were lured into traps and killed while the COG Navy tried to take out the Leviathans. Eventually the subs CNV Clement and Zephyr managed to get a lock on one of the Leviathans and blow it up with a combined torpedo attack while the other one was lured into a trap by Delta-One using the CNV Falconer and was killed by Damon Baird with the Hammer of Dawn which also destroyed a third of a New Jacinto. This Leviathan beached and released a couple hundred more polyps, but these were dealt with.

Battle of PelruanEdit

Main article: Battle of Pelruan

While the First Battle of New Jacinto was going on, a third, smaller Lambent Leviathan was attacking Pelruan. The Leviathan released polyps in three waves that attacked the town and destroyed KR Three-Three. Eventually, the Leviathan was killed by the crew of KR-239 which unleashed all of its ammo into the Leviathan's head, killing it. The Leviathan exploded, nearly destroying the King Raven and the rest of the polyps were killed.

Further attacks and collapse of the COGEdit

For several months following the battles at New Jacinto and Pelruan, the Lambent continued to besiege the island from stalks and in one case, another Lambent Leviathan. Various Lambent creatures including polyps, Lambent Dogs, Lambent Cats, and a Lambent Bull were released all over the island. This also resulted in the creation of an Imulsion field on the island, allowing the COG and their Gorasni allies to refuel for the first time since Emerald Spar was destroyed. Eventually, after New Jacinto came under attack by Lambent lifeforms and Pelruan was flooded, the COG was forced to disband and abandon Vectes to the Lambent and head to the mainland which was also besieged by Lambent forms.

Global PandemicEdit


Gears fighting Lambent in Hanover.

18 months after the sinking of Jacinto, Chairman Prescott abandoned the COG and vanished, leaving the last remnant of the COG to fend for themselves - as Stranded. Marcus Fenix and Delta squad took up residence on board the CNV Sovereign along with many other Gears and civilians. While the Sovereign was sailing through Lambent waters, a large group of Lambent Stalks emerged from the ocean around the ship, forcing Delta to defend it. Around this time, Richard Prescott landed in a King Raven with two Gears, bringing a message to Marcus from Adam Fenix revealing he's still alive and being held captive by the Locust. The Lambent also sent a Lambent Leviathan to attack the ship and though it was killed by a crate of Tickers being dropped on it, the ship was destroyed in the process along with the Centennial Bridge. During the Mission to Hanover, Delta also came into conflict with Lambent lifeforms.


Gears battling a Lambent Berserker.

The Lambent later attacked Anvil Gate during the Battle of Anvil Gate, sending three Stalks with Lambent Drones, Lambent Drudges and a Lambent Berserker. Most were killed by the retreating forces while the rest, except the Berserker, was killed by the Hammer of Dawn. The Berserker survived a direct strike but was killed by multiple shots to its Imulsion core.

During the Mission to Mercy and the Mission to Char, the Lambent attacked with most of the enemies in Mercy being Lambent Humans who had been turned Lambent due to Imulsion exposure. In order to destroy the Lambent and Locust forces in Mercy, Dominic Santiago was forced to sacrifice himself to ram a fuel tank with a vehicle, causing a massive explosion that obliterated all but the Gears who escaped. At Char, the Lambent took over an Imulsion refinery and attempted to prevent Delta Squad from getting fuel from it, but failed.

During the Second Battle of Azura, the Lambent attacked, attempting to prevent Adam Fenix from detonating the Imulsion Countermeasure Weapon that would destroy them, sending a variety of forms to attack. The attack failed as the weapon activated and destroyed all Lambent in the area as it powered up. The weapon went off completely and destroyed all Lambent lifeforms across the planet and all Imulsion, ending the invasion and the pandemic.[1]


Following the end of the pandemic, relative peace returned to Sera as the Locust were apparently wiped out as well. However, 25 years after the pandemic was ended, the Locust returned, having evolved into an even greater threat, the Swarm.[4]



  1. 1.0 1.1 Gears of War 3
  2. Gears of War: Coalition's End
  3. Gears 5
  4. Gears of War 4
Battles of the Lambent Pandemic
14 A.E. Sinking of the Harvest
15 A.E. Sinking of the Nezark · Sinking of the Levanto · Sinking of the Coral Star · Skirmish on the CNV Clement · Battle of the Emerald Spar Platform · First Battle of New Jacinto · Battle of Pelruan · Battle of Grid Echo-Five · Battle of the Vectes Imulsion Field · Battle of Edlar Farm · Second Battle of New Jacinto · Emergence on the Southwest Coast of Vectes · Vectes Imulsion Field Incident · Meadow Skirmish · Stalk Emergence at the Reservoir · Third Battle of New Jacinto · Flooding of Pelruan · Battle of Gerrenhalt
17 A.E. Victory Day (Mission to Hanover · Battle of Cougars Stadium · Attack on the Sovereign · Battle of Centennial Bridge · Battle of Anvil Gate · Mission to Halvo Bay · Mission to Mercy · Mission to Char · Second Battle of Anvil Gate · Second Battle of Azura · Battle of Pinnacle Tower)

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