Chapter Summaries

Leon entered Raccoon City Hospital to find Director Nathaniel Bard, obtain the original T-virus sample, vaccine samples, and research data, and help save the city. After proving his strength and telling Bard he came from another world at the request of the World Consciousness, Leon persuaded him to show the printed research materials.

• Leon heard Nathaniel Bard's recording confessing Umbrella's role in the T-virus outbreak and scanned the hospital, finding Bard as its only living person.
• Leon entered the hospital, left JARVIS to deal with the zombies, and punched Hunter β and an iron door through the wall outside Bard's laboratory.
• Leon asked Bard for the T-virus sample, vaccine samples, and research data, then said he was from another world and had come at the World Consciousness's request.
• Leon blasted a hole through a wall with his breath, convincing Bard to believe his story and eagerly ask about other worlds and the World Consciousness.
• Leon asked Bard to show him the research, and Bard agreed to take him to the printed materials he had planned to burn.

Leon memorized Umbrella’s experimental documents in seconds, recognized that his research talent had been enhanced, and set off with JARVIS and Director Bard for the Raccoon City Police Department. After surveying the station, Leon killed Chief Brian Irons and arrived above the entrance with Bard as JARVIS caught up.

• Leon rapidly memorized the experimental documents, discovered his biochemical research talent had improved, and told Director Bard to burn the papers.
• Leon collected T-virus stock solution and vaccine samples, then flew with JARVIS and Director Bard to the Raccoon City Police Department.
• Leon used X-Ray Vision to survey the station and found only five survivors, including Chief Brian Irons.
• Leon killed Chief Brian Irons with Heat Vision while Irons was handling the mayor’s daughter’s corpse.
• JARVIS arrived beside Leon, and Director Bard realized they had reached the police station.

Leon and Director Bard reached the Raccoon City police station, where they met Marvin Branagh and two other officers and explained the outbreak and Leon’s powers. The officers tentatively trusted them, and Marvin asked Bard to examine an ill person inside the station.

• Leon froze the streets and zombies around the police station, then shattered the iceberg blocking its gate.
• Leon and Bard reached the station, and Leon leaped over the gate when the frozen bolt would not open.
• JARVIS flew into the courtyard, startling Marvin Branagh and the two officers with him.
• Leon and Bard explained that Umbrella Corporation caused the crisis, and Leon demonstrated Freeze Breath to earn the officers’ tentative trust.
• Marvin introduced Elliot Edward and Fatty, then asked Bard to examine a sick person behind a medical partition.

Leon and Bard uncovered the police station’s secret entrance to an Umbrella laboratory and used antiviral serum to save Brad Vickers and Kendo’s infected daughter. After Marvin’s team found three survivors, Leon led Bard and JARVIS into the underground passage to make a more effective vaccine.

• Bard identified Brad Vickers as recently infected, and Leon supplied serum that began to restore him.
• Leon revealed the Umbrella laboratory beneath the Statue of Liberty sculpture and smashed open its hidden entrance.
• Leon sent Marvin and the other officers to search for survivors while JARVIS cleared zombies from the station.
• Marvin’s team returned with Robert Kendo, his daughter Emma, and FBI agent Ada Wong.
• JARVIS injected Emma with serum, and her eyes began returning to normal.
• Leon, Bard, and JARVIS entered the underground laboratory to develop a new vaccine.

Ada Wong followed Leon and the others into the underground facility, probing him while he led the group toward Umbrella Research Institute. The group reached the sewers, where Ada reluctantly joined them in the filthy water.

• Marvin left Old Fatty behind to guard the survivors and led Elliot toward the underground passage.
• Ada Wong slipped into the passage after Marvin and Elliot, while Old Fatty decided not to chase her.
• Leon, Ada Wong, Director Bard, Marvin, and Elliot descended in the elevator, where Ada questioned Leon and Bard about his abilities.
• Leon forced open locked doors and froze zombies as he led the group down to the sewers beneath the police station.
• Leon flew above the sewage while Marvin and the others waded through it, and Ada Wong sighed before jumping in after them.

Leon led the group through the sewer to a cable car bound for Umbrella's research facility, defeating the mutants and overcoming obstacles with ease. Annette Birkin ambushed them in the monitoring room but was captured, and the group discovered they needed her authorization wristband to operate the cable car.

• Leon guided the group through the mutant-infested sewers, protecting them from attacks and clearing their path.
• Leon saved Ada Wong from a giant insect, then tore down the locked monitoring-room door before she could pick its lock.
• Annette Birkin emerged from hiding and warned the group to leave, while Ada accused her of creating the virus and demanded the G-virus.
• Annette threw a grenade and shot at Ada, but Leon caught the grenade unharmed, pulled Ada clear, and had Marvin restrain Annette.
• The group reached the cable car, learned it required a staff authorization wristband, and Ada urged them to interrogate Annette rather than force the door.

Leon led the group through Umbrella’s underground laboratory, where JARVIS cleared the infected and found Sherry being chased by William Birkin. Annette tried to kill Sherry to prevent the G-virus from spreading, but Leon went to confront William.

• Leon used JARVIS to open the cable car and lead the group into the underground laboratory, promising to develop a vaccine by morning.
• JARVIS opened the laboratory’s security gates, and Leon sent it to eliminate the creatures while the group searched researchers’ diaries about the outbreak.
• JARVIS reported a Tyrant-like creature chasing a little girl, and Leon recognized her as Sherry Birkin and ordered JARVIS to bring her back with the monster.
• JARVIS returned with Sherry, and Annette reunited with her daughter before suddenly taking Ada’s gun and trying to shoot Sherry.
• Ada subdued Annette, who explained that she feared William would infect Sherry and spread the G-virus; Leon said he would stop William and walked toward the monster.

Leon killed William Birkin, then worked with the survivors to develop an airborne T-virus vaccine and serum, along with a G-virus treatment. With the vaccines ready for mass production, Leon began his own research.

• Leon killed William Birkin and burned his body to ash, after which Annette retrieved some of the remains and went into the laboratory, where a gunshot rang out.
• Leon assigned Marvin, Elliot, Bard, Sherry, and JARVIS tasks to gather resources and prepare vaccine research, while Ada Wong left after Leon offered her a job.
• Jill Valentine left the subway station to find Stark and help save Raccoon City, despite Carlos urging her to leave with the others.
• Leon developed an airborne T-virus vaccine and serum, and tests showed they worked on lab mice and could protect a thirty-meter radius for up to half an hour.
• Leon ordered the survivors to mass-produce the T-virus treatments and gave Bard a new G-virus serum to test before beginning his own research.

Leon developed the Prototype S-virus but destroyed all traces after an experiment with his Kryptonian blood nearly created a dangerous airborne infection. He returned to the police station with vaccines and Anti-virus Bombs, ready to help save Raccoon City, while Sherry found someone she could rely on.

• Leon synthesized the Prototype S-virus, which could turn infected people into powerful zombies or enhance survivors, but found it unsuitable for treating Tony.
• Leon’s Kryptonian blood absorbed the S-virus and began reproducing uncontrollably, so he destroyed the experiment and secured the sole remaining sample.
• Bard reported that the G-virus serum cured recent infections and that enough T-virus vaccine and serum had been made for Raccoon City, along with more than five hundred Anti-virus Bombs.
• Marvin and Elliot left with JARVIS to prepare the bombs, while Ada asked Leon for a long-term job and he hired her on the condition that he first earn legitimate income.
• Leon and the others carried vaccines and bombs back to the police station, where survivors gathered and Kendo thanked Leon for helping his daughter Emma.
• Sherry asked Leon to protect her, and he promised he would.

Leon and the survivors rescued Raccoon City by freezing zombies and spreading vaccines and serum. After warning them about Umbrella and promising to return, Leon traveled back to his own world, leaving JARVIS behind to help.

• Jill thanked Leon for saving Brad, then joined the others in preparing to rescue Raccoon City's survivors.
• Leon, JARVIS, and the armed squads spread vaccines and anti-virus bombs while Leon froze the city's outer streets, killing the exposed zombies.
• The rescue plan succeeded, and thousands of survivors gathered at the police station to celebrate and thank Leon.
• Leon told Marvin, Jill, and the others that he would return after testing the time difference between worlds, and warned them to prepare for evacuation and expose Umbrella's crimes.
• Leon said goodbye to the survivors, left JARVIS to assist them, and traveled back to the Marvel world.
• Marvin and Elliot remembered that a police recruit named Leon S. Kennedy had also been due to arrive the previous day.

Leon returned to Stark Mansion after twelve hours in the Resident Evil world and told Tony about his trip. Tony reasoned that traveling between worlds might let Leon choose when he reappeared in time, and Leon prepared to test the idea again while Tony asked to go along.

• Leon returned to the basement, where JARVIS explained that only twelve hours and thirty-seven minutes had passed and Tony had repeatedly asked about him before falling asleep.
• Tony greeted Leon and learned that he had left his armor behind in the Resident Evil world; Leon then summarized his journey and the virus threat.
• Tony used an analogy about space and gravity to suggest that Leon traveled between points in time when crossing worlds and could choose his return point at an energy cost.
• Leon prepared to cross over again to test Tony's theory, but Tony asked to accompany him.
• Leon noticed Tony's new reactor and learned that Tony had synthesized a new element called Badassium two hours after Leon left.

Leon obtained an Extremis virus sample and research records from Natasha, intending to study them for his S-virus research. He then joined Tony in the Stark Mansion basement and began preparing to travel to another world.

• Leon called Natasha and asked her to obtain a sample of the Extremis virus from Advanced Idea Mechanics.
• Natasha brought Leon to a former Red Room safe house in Tennessee and gave him the virus reagent and a USB drive.
• Leon and Natasha discussed the virus's potential and its side effects, then spent time together before he left.
• Natasha told Leon that Advanced Idea Mechanics was kidnapping beggars for human experiments, and Leon agreed to let her take action against the organization.
• Leon returned to Stark Mansion with the sample and explained the Extremis virus to Tony.
• Leon placed a Biological Force Field around Tony and began searching for a world to travel to.

After thirty days in the Resident Evil world had passed, Leon and Tony traveled there and found the world engulfed in war. The World Consciousness gave Tony a biological compatibility enhancement and begged Leon to save the world, while JARVIS began explaining what had happened.

• Leon learned that he could travel to the future of the Resident Evil world, brought Tony and the Stark mansion along, and set their destination thirty days after his departure.
• Leon and Tony arrived in a rainforest on October 29, and Tony woke after the armor's systems had shut down during the journey.
• Leon heard signs of war and suffering across the world, then learned from the World Consciousness that the world was nearing a loss of control and needed his help.
• The World Consciousness's gift could not merge with Leon, so Leon had it modify Tony to accept and fuse Resident Evil-related biological factors.
• Leon and Tony took flight, and JARVIS greeted Leon before saying that many things had happened while he was gone.

JARVIS explained how an infected rat carried Leon’s Prototype S-virus from Raccoon City to Hunk, triggering a global zombie apocalypse and nuclear crisis. Leon realized the World Consciousness had deliberately spread the virus to force evolution and decided to go to Raccoon City.

• JARVIS recounted how survivors escaped Raccoon City, then Ada Wong exposed Umbrella’s crimes while hiding with Sherry and Bard.
• JARVIS revealed that an infected rat bit Hunk, who transformed at Umbrella’s New York branch and sparked a catastrophic outbreak.
• Umbrella’s Albert Wesker seized control, spread the Ascension Virus worldwide, and helped drive nations into collapse and nuclear conflict.
• Jill and Marvin’s group reunited in Raccoon City, and Jill survived injecting Leon’s original virus solution, becoming stronger than ordinary superhumans.
• JARVIS reported that the old United States government and Russia planned imminent nuclear strikes, with five hours remaining.
• Leon concluded that the World Consciousness had caused the outbreak and decided to travel to Raccoon City with Tony.

Leon returned to Raccoon City, reunited with its survivors, and promised to save the world in exchange for the World Consciousness’s rewards. After hearing about the nuclear threat, Super Zombies, and the worldwide zombie crisis, he proposed creating a new S-virus to turn ordinary people into superhumans.

• Leon arrived in Raccoon City and reunited with Sherry, Jill, Ada Wong, Bard, and the other survivors.
• Leon told the group he could save the world, seeking the World Consciousness’s offer of half the world’s authority and the Gene Self-Locking Ability.
• Leon introduced Tony Stark to the survivors, who praised Tony as Leon’s brother.
• Jill briefed Leon on the Russian nuclear missile, the growing number of zombies, and the Super Zombies threatening Raccoon City.
• Leon decided to destroy the missile and kill the Super Zombies before nightfall, then proposed developing a new S-virus to make ordinary people superhuman.

Leon and Tony worked together to develop an S-virus vaccine and a modified S1 Virus, while Tony began testing a fusion with the Extremis virus. Leon then wiped out Super Zombies around the world and destroyed more than ten thousand nuclear warheads, revealing his face to people watching from Earth.

• Leon and Tony rode to the underground research facility, where Tony proved his grasp of biochemistry and quickly joined Leon in studying the S-virus.
• Leon and Tony produced a Prototype S-virus Vaccine and a modified S1 Virus, then Leon gave Tony the Extremis virus to test for a fusion.
• Leon flew into space and used Heat Vision to destroy tens of millions of Super Zombies across the Earth.
• Leon located nuclear warhead stockpiles and carried more than ten thousand warheads from the United States and Russia into space, where he destroyed them.
• Countless satellites and screens recorded Leon's face as he turned toward Earth amid the fireworks of the exploding warheads.

Leon collected Plaga and E-Mold samples, then destroyed the Megamycete and the mold-infected village before returning to a jubilant police station. The survivors celebrated his victories, and Leon led them in singing The Internationale.

• Leon descended on a Spanish village, destroyed the castle, killed Osmund Saddler, and took the Dominant Plaga parasite after ordering the others to destroy their parasites within three days.
• Leon traveled to Romania, collected hyphae from the Megamycete, and burned it to ashes.
• Leon froze Miranda and the mold-infected village, carried the enormous ice block into space, and smashed it apart.
• Leon returned to the police station, where Jill and the survivors welcomed and celebrated him.
• Leon sang a Chinese version of The Internationale, and the survivors joined in English and Russian before the celebration continued into the night.

Leon and Tony combined several biological agents with the Super-Soldier Serum method to create the SS-Type Enhancement Serum, which promised powerful upgrades without infection or side effects. Leon planned different serum versions for global distribution and trusted allies, while reserving the final version for Tony; then Leon sensed a sudden wave approaching.

• Leon reviewed Tony's research and realized the Super-Soldier Serum could provide a safer medium for combining the viruses and other agents.
• Leon retrieved incomplete Super-Soldier Serum data from Stark Industries Park and began working on the formula.
• Tony joined Leon in the laboratory, and together they synthesized the SS-Type Enhancement Serum.
• Leon explained that SS1-Type would be distributed globally, SS2-Type would go to trusted people, and SS3 Type would be reserved for Tony.
• As Leon offered to take Tony to get food, a wave suddenly descended and changed Leon's expression.

Leon created a new S-virus at the World Consciousness’s request and agreed to find someone to test it on. After spending time with Jill and Ada, he returned to the police station, where Tony resolved to begin his own live-subject experiment so he could keep up with Leon.

• The World Consciousness told Leon it needed an infectious evolutionary drug rather than the stable SS Serum, so Leon synthesized an S-virus with a low infection mutation rate.
• The World Consciousness urged Leon to spread the virus, and Leon promised to find a test subject after eating with Tony.
• Leon met Jill, who confronted him for leaving after their night together, and Ada joined them, prompting an argument over their relationship with Leon.
• The next morning, Leon and Tony joked about their romantic exploits while eating breakfast at the police station.
• Tony headed to the research institute to complete a live-subject experiment and inject the serum, determined not to let Leon be the only one showing off.

Leon and Tony developed the Final S-virus, and Raccoon City began enhancing its people after the first trials succeeded. Leon also gave Ada, Jill, and Sherry SS2 Serum, while he and Tony completed an experiment with SS3 Serum.

• Tony announced that the apocalypse was over after he and Leon developed a virus with a very low mutation rate, but the volunteers immediately pushed to begin testing instead of celebrating.
• Leon injected Leon S. Kennedy with the Final S-virus, and Kennedy survived the enhancement without mutating, earning cheers from the volunteers.
• Marvin, Elliot, Fatty, Carlos, and others received the Final S-virus successfully, and more than 1,700 members of the temporary government completed injections with only one mutation that was reversed by antiviral serum.
• Leon injected Ada, Jill, and Sherry with SS2 Serum fused with Extremis traits, giving them super-regenerative abilities and greatly enhanced strength and speed.
• After several days of observation, Jill's temporary government began distributing the Final S-virus across Raccoon City, where residents crowded registration sites to receive it.
• Leon and Tony completed the injection experiment for SS3 Serum.