Left 4 Dead 2 Xbox 360 Unlockables

Survive the Dead Center campaign.

Survive the Dark Carnival campaign.

Survive the Swamp Fever campaign.

Survive the Hard Rain campaign.

Survive the Parish campaign.

Survive all campaigns on Expert.

Survive a campaign on Expert skill with Realism mode enabled.

Finish a campaign using only melee weapons.

Decapitate 200 Infected with a melee weapon.

Use every melee weapon to kill Common Infected.

Kill 100 Common Infected with the chainsaw.

Kill a Tank with melee weapons.

Revive 10 dead Survivors with the defibrillator.

Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.

Deploy an ammo upgrade and have your team use it.

Ignite 50 Common Infected with incendiary ammo.

Kill 15 Infected with a single grenade launcher blast.

Use a bile bomb on a Tank.

Kill one of each Uncommon Infected.

Kill 10 swampy Mudmen while they are in the water.

Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.

Honk the noses of 10 Clowns.

Using a Molotov, burn a Clown leading at least 10 Common Infected.

Kill a Charger with a melee weapon while they are charging.

Kill a Spitter before she is able to spit.

Kill a Jockey within 2 seconds of it jumping on a Survivor.

Prove you are faster than Moustachio.

Prove you are stronger than Moustachio.

Rescue Gnome Chompski from the Carnival.

Defend yourself at the crashed airliner without taking damage.

Navigate the sugar mill and reach the safe room without killing any Witches.

Navigate the impound lot and reach the cemetary safe room without tripping any alarms.

Cross the bridge finale in less than three minutes.

In a Versus round, leave the saferoom to defibrillate a dead teammate.

Form a team and beat an enemy team in 4v4 Versus or Scavenge.

As the Jockey, ride a Survivor for more than 12 seconds.

As the Jockey, ride the Survivors twice in a single life.

As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.

As the Spitter, hit every Survivor with a single acid patch.

As the Spitter, spit on a Survivor being choked by a Smoker.

As the Charger, bowl through the entire enemy team in a single charge.

As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.

As the Charger, grab a Survivor and carry them over 80 feet.

In a Survival round, get a medal only using melee weapons.

Win a game of Scavenge.

Collect 100 gas cans in Scavenge.

Collect 15 gas cans in a single Scavenge round.

Stop the enemy team from collecting any gas cans during a Scavenge round.

Make a Survivor drop a gas can during overtime.

Cause 25 gas can drops as a Special Infected.

Earned by beating all five campaigns (Any Difficulty)

Earned by winning 10 games of Versus

Earned by rescuing Gnome Chompski from the Dark Carnival (MUST be holding Gnome in rescue vehicle when it departs)

Earned by winning 10 games of Scavenge.

Earned by killing 10,000 Infected

Unlock the Left 4 Dead 2 hat by playing any map in 'The Passing'

Unlock the Gnome by playing any 6 Mutations