Secondary weapon options include a singe pistol (P220), dual-wielding two pistols (P220 + Glock 26), a magnum pistol (Desert Eagle), or an assortment of new melee weapons. Players can carry one secondary weapon and one primary weapon. Weapons in Left 4 Dead 2 function similarly to the first game, but many new weapons are added. Also added in these DLCs are ports of all campaigns from the original Left 4 Dead, featuring the original survivors but with the new enemy types and weapons from L4D2.
Additional campaigns are released in three DLCs: The Passing, The Sacrifice, and Cold Stream. The game is released with five campaigns: Dead Center, Dark Carnival, Swamp Fever, Hard Rain, and The Parish. In the regular campaign mode, up to four players must cooperate and fight their way through hordes of zombies to reach either a safe house at the end of a chapter or a rescue vehicle at the end of a campaign (which is made up of 3-5 chapters). Left 4 Dead 2 inherits much of the gameplay from its predecessor.