Louis is one of the four playable Survivors in Left 4 Dead. His original concept was an assistant manager at a local retail electronics chain store, but in the game, he is a Junior Systems Analyst at “Franklin Brothers” in the IT department located in Philadelphia PA, until the second day after the first Infection. In official media, he is usually seen wielding a Submachine Gun or dual Pistols.
Zoey is one of the four playable Survivors in Left 4 Dead. Her original design was based on Alesia Glidewell, who also worked with Valve on Portal as a model for the character Chell. However, when the character designs were updated later in development, Zoey was made to resemble actress/model Sonja Kinski instead. In official media, she is usually seen wielding dual Pistols.
Francis is one of the four playable Survivors in Left 4 Dead. He is a tough biker with tattoos covering his arms and neck. His tattoos identify him as a member of "Hells Legion", a name possibly inspired by the real-world Hells Angels Motorcycle Club. In official media, he can usually be seen wielding either the Pump Shotgun or the Auto Shotgun.
William "Bill" Overbeck is one of the four playable Survivors in Left 4 Dead. He is a Vietnam veteran who served in the U.S. Army 1st Special Forces Group, and is the oldest of the group. He is usually seen wielding the Assault Rifle (which appears as the M16A2, a real-life assault rifle used by the U.S. Military after the Vietnam War). He often has a lit cigarette in his mouth that only extinguishes when he dies.
Ellis (also known as El) is one of the four playable Survivors in Left 4 Dead 2. He is the youngest of the group. A junior mechanic by trade in the city of Savannah, he presents himself as a goofy, beer-loving country guy with an unsophisticated and sometimes naive world view.Ellis (also known as El) is one of the four playable Survivors in Left 4 Dead 2. He is the youngest of the group.
Rochelle (also known as Ro) is one of the four playable Survivors in Left 4 Dead 2. She was employed as an associate producer on a television news station in which role she was sent on assignment to Savannah (the location of the first campaign) to cover The Infection's breaking story.
Coach (real name unknown) is one of the four playable Survivors in Left 4 Dead 2. He was a high-school health teacher and coordinator for the freshman football team before the Infection hit his hometown of Savannah. He is the oldest of the group and takes it upon himself to motivate his fellow Survivors.
Nicolas, or Nick is one of the four playable Survivors in Left 4 Dead 2. He is a gambler with a shady―even violent―past. He seems reluctant to be a part of the group at all and takes the role of "the complainer," finding fault in other people's plans, the increasingly sorry state of his once-fine suit and his teammates' character flaws, as he judges them. This makes him difficult for the others to get along with at first, but that changes as time goes by, as he learns to trust them and proves himself a valuable part of the team.