Left 4 Dead 2 Cheats,Unlockables and Achievements

Achievements

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Price Chopper (20 points): Survive the Dead Center campaign.
Midnight Rider (20 points): Survive the Dark Carnival campaign.
Ragin' Cajun (20 points): Survive the Swamp Fever campaign.
Weatherman (20 points): Survive the Hard Rain campaign.
Bridge Burner (20 points): Survive the Parish campaign.
Still Something To Prove (35 points): Survive all campaigns on Expert.
The Real Deal (35 points): Survive a campaign on Expert skill with Realism mode enabled.
Confederacy Of Crunches (30 points): Finish a campaign using only melee weapons.
Head Honcho (15 points): Decapitate 200 Infected with a melee weapon.
Club Dead (15 points): Use every melee weapon to kill Common Infected.
Chain Of Command (15 points): Kill 100 Common Infected with the chainsaw.
Tank Burger (30 points): Kill a Tank with melee weapons.
Shock Jock (30 points): Revive 10 dead Survivors with the defibrillator.
The Quick And The Dead (30 points): Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
Armory Of One (15 points): Deploy an ammo upgrade and have your team use it.
Burning Sensation (15 points): Ignite 50 Common Infected with incendiary ammo.
Dismemberment Plan (20 points): Kill 15 Infected with a single grenade launcher blast.
Septic Tank (15 points): Use a bile bomb on a Tank.
Crass Menagerie (20 points): Kill one of each Uncommon Infected.
Dead In The Water (20 points): Kill 10 swampy Mudmen while they are in the water.
Robbed Zombie (15 points): Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
Cl0wnd (15 points): Honk the noses of 10 Clowns.
Fried Piper (15 points): Using a Molotov, burn a Clown leading at least 10 Common Infected.
Level A Charge (15 points): Kill a Charger with a melee weapon while they are charging.
Acid Reflex (15 points): Kill a Spitter before she is able to spit.
A Ride Denied (15 points): Kill a Jockey within 2 seconds of it jumping on a Survivor.
Stache Whacker (15 points): Prove you are faster than Moustachio.
Gong Show (15 points): Prove you are stronger than Moustachio.
Guardin' Gnome (30 points): Rescue Gnome Chompski from the Carnival.
Wing And A Prayer (30 points): Defend yourself at the crashed airliner without taking damage.
Sob Story (30 points): Navigate the sugar mill and reach the safe room without killing any Witches.
Violence In Silence (30 points): Navigate the impound lot and reach the cemetary safe room without tripping any alarms.
Bridge Over Trebled Slaughter (30 points): Cross the bridge finale in less than three minutes.
Heartwarmer (20 points): In a Versus round, leave the saferoom to defibrillate a dead teammate.
Strength In Numbers (15 points): Form a team and beat an enemy team in 4v4 Versus or Scavenge.
Qualified Ride (15 points): As the Jockey, ride a Survivor for more than 12 seconds.
Back In The Saddle (15 points): As the Jockey, ride the Survivors twice in a single life.
Rode Hard, Put Away Wet (20 points): As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
Great Expectorations (15 points): As the Spitter, hit every Survivor with a single acid patch.
A Spittle Help From My Friends (15 points): As the Spitter, spit on a Survivor being choked by a Smoker.
Scattering Ram (20 points): As the Charger, bowl through the entire enemy team in a single charge.
Meat Tenderizer (20 points): As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
Long Distance Carrier (15 points): As the Charger, grab a Survivor and carry them over 80 feet.
Beat The Rush (15 points): In a Survival round, get a medal only using melee weapons.
Hunting Party (15 points): Win a game of Scavenge.
Gas Guzzler (20 points): Collect 100 gas cans in Scavenge.
Cache And Carry (20 points): Collect 15 gas cans in a single Scavenge round.
Scavenge Hunt (15 points): Stop the enemy team from collecting any gas cans during a Scavenge round.
Fuel Crisis (15 points): Make a Survivor drop a gas can during overtime.
Gas Shortage (20 points): Cause 25 gas can drops as a Special Infected.