Spec-Ops

A new Special Ops mode includes one and two player cooperative play. Special Ops mode includes several fast-paced action missions similar to "Mile High Club" which are more difficult than normal campaign missions and are not related to the main storyline. It picks out certain parts of the single player campaign that "work well with co-op". Missions are unlocked by earning stars, which are acquired by playing levels at certain difficulties. Regular difficulty earns one star, hardened earns two, and veteran earns three. Missions are divided into five groups, named Alpha, Bravo, Charlie, Delta, and Echo - the last being the hardest. Within the groups there are types of missions such as "Breach and Clear" and "Elimination". There are special enemy types, such as those using riot shields, even the Special Ops exclusive Juggernaut, wearing heavy bomb squad armor. There are a total of 23 Special Ops missions, two of which are only playable in two player co-op due to one player assisting the other in carrying out the mission's objective from air support.

Characters

Task Force 141
Sergeant Gary "Roach" Sanderson is a playable character and member of Task Force 141.
Captain "Soap" MacTavish (The main playable character from Call of Duty 4: Modern Warfare) is the Commanding officer of Task Force 141.
Captain John Price (Soap's commanding officer from Call of Duty 4: Modern Warfare) returns to fight alongside Soap.
Lieutenant Simon "Ghost" Riley is a member Task Force 141.
Nikolai (a Loyalist that was rescued by Captain Price and his squad in Call of Duty 4: Modern Warfare) returns in the missions The Hornet's Nest, Endgame, and The Enemy Of My Enemy.
U.S. Army Rangers
Lt. General Shepherd is the commander of the U.S. forces and Task Force 141.
Private James Ramirez is a U.S. Army Ranger, and a playable character.
Sergeant Foley is a the leader of Ramirez's squad in the U.S. Army Rangers.
Private First Class Joseph Allen is in Foley's squad of the U.S. Army Rangers, and later a member of the C.I.A.
Corporal Jake Dunn is the second in command in Foley's squad in the U.S. Army Rangers.
Raptor is a High-Value Individual rescued in "Wolverines!". He carries valuable information in a briefcase.
William Cullen is the Secretary of Defense mentioned in Loose Ends and heard in Second Sun.
Central Intelligence Agency
Alexei Borodin is the undercover alias of Joseph Allen in No Russian.
Russian Federation
Major Petrov is the airfield commander in the level Cliffhanger.
Boris Vorshevsky is the president of Russia and becomes leader of the Ultranationalists.
Ultranationalists
Vladimir Makarov is the new leader of the Ultranationalists.
Viktor is one of the terrorists in "No Russian".
Anatoly is one of the terrorists in "No Russian".
Lev is one of the terrorists in "No Russian".
Kiril is one of the terrorists in "No Russian".
Langley is one of the terrorists in "No Russian".
Jester is one of the terrorists in "No Russian".
Brazilian Militia
Alejandro Rojas is an arms dealer based in Rio de Janeiro.
Rojas' assistant is Rojas' right hand man.

Missions & Times

Alpha

Predator Drones, favela gangs, sniper rifles and stealth. These Ops are short and sweet. Complete the Campaign to unlock.

 The Pit
Clear all of the enemy targets as fast as possible. Shooting civilians will prevent you from getting 3 stars.

Est. Opposition: None
Classification: Assault
Est. Completion Time: 1:00.00
IW Best Time: 00:22.55 
 

 Sniper Fi
Use sniper rifles, claymores and Predator Drones to hold off waves of enemies.

Est. Opposition: Light
Classification: Wave Defense
Est. Completion Time: 4:00.00
IW Best Time: 01:55.50 
 

 O Cristo Redentor
Hunt down and eliminate the Favela gang. Minimize Civilian casualties.

Est. Opposition: Light
Classification: Elimination
Est. Completion Time: 2:30.00
IW Best Time: 01:16.20 
 

 Evasion
Use silenced sniper rifles and cunning to slip past the enemy patrols.

Est. Opposition: Light
Classification: Stealth
Est. Completion Time: 3:00.00
IW Best Time: 00:43.65 
 

 Suspension
Push through the invading forces on the bridge to reach the safe zone.

Est. Opposition: Medium
Classification: Assault
Est. Completion Time: 3:30.00
IW Best Time: 00:53.00 
 

Bravo
AC-130 gunships, snowmobile races, and Vulcan miniguns with explosive ammo. Something for everyone.

Earn 4 stars to unlock. 
 

 Overwatch
Rain death from above using an AC-130 gunship to protect your partner.

Est. Opposition: Light
Classification: Timed Escort
Est. Completion Time: 1:30.00
IW Best Time: 00:35.45
Two Players Required 
 

 Body Count
Rack up a large enough body count. Quick kills earn larger bonuses.

Est. Opposition: Medium
Classification: Elimination
Est. Completion Time: 2:30.00
IW Best Time: 01:16.20 
 

Bomb Squad
Race through the Favela marketplace defusing the explosives before its too late.

Est. Opposition: Medium
Classification: Timed Assault
Est. Completion Time: 2:30.00
IW Best Time: 01:14.20 
 

 Race
Speed your snowmobile down the mountain, dodging trees, rocks, and thousand foot drops.

Est. Opposition: Minimal
Classification: Driving
Est. Completion Time: 1:30.00
IW Best Time: 01:05.00 
 

 Big Brother
Explosive ammunition, Vulcan Minigun, Blackhawk Helicopter . Clear the way.

Est. Opposition: Medium
Classification: Timed Escort
Est. Completion Time: 3:00.00
IW Best Time: 01:25.90
Two Players Required 
 

Charlie
Time trials, explosive breaches, boneyards and enemies in Ghillie Suits. Things are getting a bit tougher.

Earn 8 stars to unlock. 
 

 Hidden
Evade enemy patrols and Ghillie Snipers near Chernobyl.

Est. Opposition: Medium
Classification: Stealth
Est. Completion Time: 4:30.00
IW Best Time: 01:45.60 
 

 Breach & Clear
Smash through enemy defenses in the Gulag and escape.

Est. Opposition: Heavy
Classification: Assault
Est. Completion Time: 1:30.00
IW Best Time: 00:17.00 (damn!) 
 

 Time Trial
Launch your snowmobile across the chasm before time runs out. Hit the flag gates to get extra time.

Est. Opposition: Light
Classification: Timed Driving
Est. Completion Time: 1:30.00
IW Best Time: 01:07.00 
 

Homeland Security
Sentry guns, Thermal sights, Rocket launchers and Claymores. Defend yourself from five difficult waves of attackers.

Est. Opposition: Heavy
Classification: Wave Defense
Est. Completion Time: 11:00.00
IW Best Time: 07:31.20 
 

 Snatch & Grab
Battle Shadow Company and Juggernauts in the airplane graveyard. Grab the intel and escape to the extraction point.

Est. Opposition: Medium
Classification: Assault
Est. Completion Time: 3:30.00
IW Best Time: 01:22.40 
 

 Delta
Blizzards, airports, estates and bridges. Five challenging Ops.

Earn 20 stars to unlock. 
 

 Wardriving
Laze targets for the Stryker armored vehicle. Battle in the 'burbs house to house, room to room.

Est. Opposition: Heavy
Classification: Assault & Defend
Est. Completion Time: 9:00.00
IW Best Time: 3:25.25 
 

Wreckage
Use C4, grenade launchers, RPGs, sentry guns, semtex and more to destroy every vehicle on the bridge.

Est. Opposition: Medium
Classification: Vehicle Killspree
Est. Completion Time: 3:30.00
IW Best Time: 01:40.40 
 

 Acceptable Losses
Sabotage the remote airbase with your silenced weapons and heartbeat sensor.

Est. Opposition: Medium
Classification: Stealth
Est. Completion Time: 7:00.00
IW Best Time: 00:48.15 
 

 Terminal
Pummel your way through enemy riot shield ambushes.

Est. Opposition: Heavy
Classification: Assault
Est. Completion Time: 4:00.00
IW Best Time: 00:36.40 
 

 Estate Takedown
Eliminate Ghillie Snipers, Elite Mercenaries, and Juggernauts guarding the estate.

Est. Opposition: Medium
Classification: Elimination
Est. Completion Time: 9:00.00
IW Best Time: 02:59.60 
 

 Echo
An oil rig and a favela full of Juggernauts. These Ops are fast and brutal.

Earn 40 stars to unlock. 
 

 Wetwork
Breach and clear two deadly rooms full of enemies and hostages to capture the oil rig.

Est. Opposition: Massive
Classification: Assault
Est. Completion Time: 5:00.00
IW Best Time: 03:10.30
Slow-mo Breach 
 

 High Explosive
Kill all ten Juggernauts using only explosives and a knife. You'd be insane to even try this.

Est. Opposition: Massive
Classification: Elimination
Est. Completion Time: 6:00.00
IW Best Time: 02:47.70
Explosives & Knives Only 
 

 Armor Piercing
Kill all fifteen Juggernauts on the oil rig. This probably isn't even possible.

Est. Opposition: Massive
Classification: Elimination
Est. Completion Time: 7:00.00
IW Best Time: 04:12.25 (apparentely it IS possible)