Alpha

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

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

-O Cristo Redentor : Hunt down and eliminate the Favlea gang. Minimize civilian casualties

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

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

Bravo

-Overwatch (Two-Players Required) : Rain death from above using an AC-130 gunship to protect your partner.

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

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

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

-Big Brother (Two-Players Required) : Explosive ammunition, Vulcan Minigun, Blackhawk Helicopter. Clear the way.

Charlie

-Hidden : Evade enemy patrols and Ghillie Snipers near Chernobyl.

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

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

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

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

Delta

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

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

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

-Terminal : Pummel your way through enemy riot shield ambushes.

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

Echo

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

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

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