Survival Mode

Survival mode is a game type on Call of Duty: Modern Warfare: Mobilized, and a Special Ops Playlist in Call of Duty: Modern Warfare 3. On Call of Duty: Modern Warfare: Mobilized, it is exclusive to Single Player, while in Call of Duty: Modern Warfare 3, it can be played cooperatively with three other players.

Call of Duty: Modern Warfare: Mobilized
It is only unlocked if the player either uses a cheat code, or beats the campaign on Hardened difficulty. Using a cheat code only temporarily unlocks it, while beating Hardened unlocks it permanently.

There are four maps in Survival. They are: Withstand, Persistence, Outlast, and Endure.
 * Withstand is in a bombed-out apartment building in Russia. There is debris all around the apartment for the player to take cover behind.
 * Persistence is in a military aircraft hangar somewhere in South America. There are several large supply cases for the player to take cover.
 * Outlast is in a small courtyard in South America. Fallen pillars, gates, and a car are all available for the player's cover.
 * Endure, the final map, is in a war-torn Middle-Eastern town. Debris is littered everywhere for cover.

When the player first unlocks the mode, they will begin with Persistence only, and other maps are progressively unlocked. To unlock a map, the player must survive at least three minutes in the previous map. At the beginning of every game, the player starts out with a USP and three Frag Grenades, but there are three randomly generated weapons that spawn on the ground, and eight seconds are given for the player to gather these weapons, and/or to find cover. The weapons found on the ground change every minute. The weapons that can be found are the M4A1 Red Dot, AN-94, AK-74, P90, MP5, MP7, M40A3, AA-12, M249, and the RPG-7. All of the weapons have a large amount of spare ammunition, and, in the M249's case, it has a 200-round mag, where it would be found in other modes to have a 100-round mag.

There is no Co-op for this mode.

Call of Duty: Modern Warfare 3
"In Survival mode you will fight off waves of increasingly difficult enemies as you earn XP and unlock several types of armories to expand your arsenal and load-out customization along the way."

- Description of Survival Mode in the Survival Mode trailer.

Survival mode returns in Call of Duty: Modern Warfare 3 as a gametype within Spec Ops mode. In Survival mode, players must fend off waves of A.I controlled enemies on various multiplayer maps. The waves are randomized, yet increasingly difficult, so that in the later stages of the game, players can expect to face multiple Juggernauts, Dogs strapped with C4 and enemy air support simultaneously. There is no means of winning in this game mode, as the waves will continue until the player has lost. Like other Spec Ops missions, co-op is available for this mode, both online or split-screen.

Survival mode also features a monetary system which allows players to buy items such as thumb|300px|right|Survival Mode Trailer For MW3air support, sentry guns, weapons, and even friendly NPCs to assist the player throughout the match. Currency is earned by killing enemies and additionally by executing spree kills, headshots and other notable actions.

In addition to their normal regenerating health, players start each match with an armor rating, which will diminish as the player takes damage. New armor and armor upgrades can be purchased at a gear armory.

When a wave is over, players can press "Select" to start the next wave, or simply wait 25 seconds for the next wave to start automatically. This is to allow players some time to ready themselves between waves or buy support, weapons, perks, weapon attachments, equipment, etc.

Assault Rifles

 * M4A1 for $3000
 * M16A4 for $3000
 * SCAR-L for $3000, unlocked at lvl 5
 * ACR 6.8 for $3000, unlocked at lvl 14
 * Type 95 for $3000, unlocked at lvl 50
 * G36C, unlocked at lvl 39
 * FAD, unlocked at lvl 32
 * CM901, unlocked at lvl 43
 * AK-47 for $3000, unlocked at lvl 24
 * MK14, unlocked at lvl 47

Sub Machine Guns

 * MP5

Light Machine Guns

 * M60E4
 * PKP Pecheneg

Shotguns

 * Model 1887
 * USAS-12 for $2000

Handguns

 * Five seven (starting weapon)

Machine Pistols

 * G18 for $1500
 * Skorpion, unlocked at lvl 3
 * MP9, unlocked at lvl 17
 * FMG9, unlocked at lvl 37

Attachments

 * Red Dot Sight for $750

Maps

 * Dome
 * Resistance
 * Arkaden
 * Underground
 * Village
 * Bootleg
 * Interchange
 * Carbon
 * Mogadishu
 * Lambeth
 * Coast
 * Payback Construction
 * Meteora

Perks

 * Extreme Conditioning for $2000, unlocked at lvl 36
 * Sleight of Hand, unlocked at lvl 50
 * Steady Aim for $2500, unlocked at lvl 8
 * Stalker, unlocked at lvl 22
 * SitRep
 * Last Stand for $5000
 * Quickdraw for $3000

Equipment

 * Frag Grenade Refill for $750
 * Flashbang Refill for $1000
 * Claymore x5 for $1000 (10 Max), unlocked at lvl 2
 * C4 x5 for $1500 (10 Max), unlocked at lvl 3
 * RPG-7 x2 for $2000 (4 Max), unlocked at lvl 27
 * Sentry Gun for $3000, unlocked at lvl 17
 * Sentry Grenade Launcher for $4000, unlocked at lvl 37
 * Body Armor for $2000, unlocked at lvl 10
 * Self Revive for $1500
 * Riot Shield for $3000, unlocked at lvl 37
 * SAM Turret for $2750

Air Support

 * Predator Missile for $2500
 * Air Strike for $3000, unlocked at lvl 4
 * Delta Squad for $3000, unlocked at lvl 14
 * Riot Shield Squad for $5000, unlocked at lvl 21
 * Perk Care Package
 * V-22 Osprey Package Drop