Swimming is a movement mechanic that appears in Call of Duty: World at War, Call of Duty: Modern Warfare 2, Call of Duty: Black Ops, Call of Duty: Black Ops II, Call of Duty: Ghosts, Call of Duty: Advanced Warfare, Call of Duty: Black Ops III, Call of Duty: WWII, Call of Duty: Black Ops 4, Call of Duty: Mobile and Call of Duty: Black Ops Cold War.
Call of Duty: World at War
Call of Duty: Modern Warfare 2
Call of Duty: Black Ops
Call of Duty: Modern Warfare 3
Call of Duty: Black Ops II
In the level "Fallen Angel", the player needs to swim through a series of flooded tunnels after gathering voice recordings and intel from Menendez, which will also be used to escape after he discovers their presence.
Call of Duty: Ghosts
Swimming is seen in the levels "Atlas Falls" and "Into the Deep"; the majority of the two levels is placed underwater, making swimming the only way to traverse the level. The player is limited to the APS Underwater Rifle and knife in the level.
Call of Duty: Advanced Warfare
Swimming is a mechanic available to the player in various levels and multiplayer maps. In the map Defender, the player can swim on one end of the map, especially once the tidal wave has struck the map. Additionally, swimming appears in the campaign level "Crash"
Call of Duty: Black Ops III
Swimming returns in Call of Duty: Black Ops III multiplayer and in the Zombies map Zetsubou No Shima, with much more freedom than before. The player can swim on the surface or underwater, and may aim and fire any weapon, even when underwater. Equipment, such as grenades, may be used or thrown underwater, although the velocity will be much reduced. Depth is controlled using the jump and crouch buttons. Players will gradually take damage if they stay underwater too long. In multiplayer, holding down the jump button underwater will allow the player to Thrust Jump directly out of the water. Players can "sprint" underwater to swim faster, though, like sprinting, this will lower their weapon.
Call of Duty: WWII
In the level "D-Day", the player can swim by crouching while on water.
Call of Duty: Black Ops 4
Swimming returns once again in Call of Duty: Black Ops 4. It functions the same way it did in Black Ops III.