(Capcom's primary storyline)
Marvin Branagh was an officer of the Raccoon City Police Department.
While still serving at the police station, Marvin rallied a small group of the collected survivors present to continue fending off the undead. Soon, the grim reality set in that nowhere was safe, not even the police station.
Shortly before rescue arrived for the group, Marvin was fatally bitten across the chest by a zombie. Knowing he was beyond help, and professional to the end, Marvin decided to remain behind, buying time for the others and locking himself in the west office.
Shortly after this, he fell unconscious due to the injuries he had sustained, and was later discovered by Jill Valentine when she fled into the police station to escape from the Nemesis. Jill mistook his unconsciousness as a state for death commenting that "he is fatally wounded". On her way out of the Police Station his body is nowhere to be found in the office room.
Marvin remained in the Police Station until Claire Redfield arrived and found him in the office. By this time, Marvin was awake and had since become the only surviving officer besides Leon Scott Kennedy, Chief of Police Brian Irons, and Elliot Edward who was killed on the roof sometime later.
Marvin informed Claire of her brother's involvement in the Mansion Incident with the other members of the Special Tactics And Rescue Service; a rescue-based special forces unit. Marvin lamented he and the other R.P.D officers didn't believe their warnings about the experiments of the Umbrella Corporation.
He concluded by requesting Claire find the other survivors and forget about him, which Claire attempted to argue. Desperately, Marvin rose his gun to the teenager ordering her to leave, though she complied, she promised to return. As she left, Marvin locked the door behind her knowing that he would soon become a zombie.
A while later, Claire found a way back into the office just as Marvin succumbed to his wounds and transformed into a zombie. Claire was forced to kill him after he tried to attack her.
In Resident Evil: The Darkside Chronicles scenario, Memories of a Lost City, Marvin once again portrays the role he carried in Resident Evil 2. Unlike the original game, he is found in the main lobby of the station and introduces himself to Leon and Claire with his full name. He jokingly welcomes Leon to his party and refers to himself as Leon's (would-be) boss.
He requests the two to go look for survivors in the other rooms while he remains in the lobby continuing to suffer from his wounds. While chasing Sherry Birkin towards the lobby, the two discover that Marvin had become a zombie and are forced to take him down.
In Resident Evil Outbreak File 2, Marvin appears as an NPC fighting off zombies inside the front gate of the RPD. Here he appears already injured. Unlike the other officers fighting throughout the RPD, he is not killed after enough time in the scenario has passed.
Marvin is also unlockable as playable in the Outbreak games. He can be unlocked by completing the "Desperate Times" Scenario as Kevin or a Kevin-type character on any difficulty. He can then be purchased for 4000pts. He can be made available in File 1 by use of File #2's data convert feature.
There is another version of Marvin in the Outbreak games. This version is coded as a character as well but was never meant to be played as, as it is statless and must be modified to have stats via game enhancer. This version is the injured Marvin's gameplay model and features a patch of blood on his stomach.
- Marvin was originally going to be a major supporting and surviving character in Resident Evil 2 (Aka Resident Evil 1.5), and was to be infected with the t-virus by a Zombie while Leon searched the underground laboratory for a vaccine.
- In Resident Evil: The Darkside Chronicles, Marvin cannot be dispatched by a headshot, in contrast to similar character Forest Speyer, who could be dispatched immediately after appearing in "The Umbrella Chronicles". However, in Resident Evil 2, he can be decapitated by using high caliber weapons such as the shotgun or the grenade launcher.
- He is a rescue-able citizen in the Resident Evil 3: Nemesis minigame The Mercenaries - Operation: Mad Jackal. He will appear in the substation, surrounded by seven naked zombies. If he is alive, player will hear him scream "Go away!", entering that room. He will drop the following items for saving him: Handgun Bullets (60) for Carlos Oliveira and Nikolai Zinoviev; First Aid Spray for Mikhail Victor. He will die if the player doesn't save him in 6 minutes of gameplay.
- It is possible that Marvin was a sergeant as he was meant to be Leon's boss and was responsible for training new recruits.
- In the Desperate Times scenario, if a player controls Kevin and goes to talk to him, they'll have a conversation about the situation going on in the city, and Marvin asks him for help to get the gems.
- Also in Desperate Times, Marvin can also converse with the 8 default characters via ad-libs if they are used near him. He cannot converse with playable NPC's however.