The plot for "Left 4 Dead 2" may still be shrouded in mystery, but the game's list of Achievements names both items and stages in the order they appear. Merely surviving will go a long way toward point accumulation, but the accomplishments contain a few fancy tricks as well. Defibrillators appear to be involved, likely as a means to heal party members. Also mentioned are "bile bombs," which will score you an Achievement when used against a tank. Check out the whole rundown and a very special clown-based Achievement after the jump.

All of the following can be found at Xbox360Achievements.org:

PRICE CHOPPER 20
Survive the Dead Center campaign.

MIDNIGHT RIDER 20
Survive the Dark Carnival campaign.

RAGIN' CAJUN 20
Survive the Swamp Fever campaign.

WEATHERMAN 20
Survive the Hard Rain campaign.

BRIDGE BURNER 20
Survive the Parish campaign.

STILL SOMETHING TO PROVE 35
Survive all campaigns on Expert.

THE REAL DEAL 35
Survive a campaign on Expert skill with Realism mode enabled.

CONFEDERACY OF CRUNCHES 30
Finish a campaign using only melee weapons.

HEAD HONCHO 15
Decapitate 200 Infected with a melee weapon.

CLUB DEAD 15
Use every melee weapon to kill Common Infected.

CHAIN OF COMMAND 15
Kill 100 Common Infected with the chainsaw.

TANK BURGER 30
Kill a Tank with melee weapons.

SHOCK JOCK 30
Revive 10 dead Survivors with the defibrillator.

THE QUICK AND THE DEAD 30
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.

ARMORY OF ONE 15
Deploy an ammo upgrade and have your team use it.

BURNING SENSATION 15
Ignite 50 Common Infected with incendiary ammo.

DISMEMBERMENT PLAN 20
Kill 15 Infected with a single grenade launcher blast.

SEPTIC TANK 15
Use a bile bomb on a Tank.

CRASS MENAGERIE 20
Kill one of each Uncommon Infected.

DEAD IN THE WATER 20
Kill 10 swampy Mudmen while they are in the water.

ROBBED ZOMBIE 15
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.

CL0WND 15
Honk the noses of 10 Clowns.

FRIED PIPER 15
Using a Molotov, burn a Clown leading at least 10 Common Infected.

LEVEL A CHARGE 15
Kill a Charger with a melee weapon while they are charging.

ACID REFLEX 15
Kill a Spitter before she is able to spit.

A RIDE DENIED 15
Kill a Jockey within 2 seconds of it jumping on a Survivor.

STACHE WHACKER 15
Prove you are faster than Moustachio.

GONG SHOW 15
Prove you are stronger than Moustachio.

GUARDIN' GNOME 30
Rescue Gnome Chompski from the Carnival.

WING AND A PRAYER 30
Defend yourself at the crashed airliner without taking damage.

SOB STORY 30
Navigate the sugar mill and reach the safe room without killing any Witches.

VIOLENCE IN SILENCE 30
Navigate the impound lot and reach the cemetary safe room without tripping any alarms.

BRIDGE OVER TREBLED SLAUGHTER 30
Cross the bridge finale in less than three minutes.

HEARTWARMER 20
In a Versus round, leave the saferoom to defibrillate a dead teammate.

STRENGTH IN NUMBERS 15
Form a team and beat an enemy team in 4v4 Versus or Scavenge.

QUALIFIED RIDE 15
As the Jockey, ride a Survivor for more than 12 seconds.

BACK IN THE SADDLE 15
As the Jockey, ride the Survivors twice in a single life.

RODE HARD, PUT AWAY WET 20
As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.

GREAT EXPECTORATIONS 15
As the Spitter, hit every Survivor with a single acid patch.

A SPITTLE HELP FROM MY FRIENDS 15
As the Spitter, spit on a Survivor being choked by a Smoker.

SCATTERING RAM 20
As the Charger, bowl through the entire enemy team in a single charge.

MEAT TENDERIZER 20
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.

LONG DISTANCE CARRIER 15
As the Charger, grab a Survivor and carry them over 80 feet.

BEAT THE RUSH 15
In a Survival round, get a medal only using melee weapons.

HUNTING PARTY 15
Win a game of Scavenge.

GAS GUZZLER 20
Collect 100 gas cans in Scavenge.

CACHE AND CARRY 20
Collect 15 gas cans in a single Scavenge round.

SCAVENGE HUNT 15
Stop the enemy team from collecting any gas cans during a Scavenge round.

FUEL CRISIS 15
Make a Survivor drop a gas can during overtime.

GAS SHORTAGE 20
Cause 25 gas can drops as a Special Infected.

I don't know about you, but the clown nose-honking sounds like a mini-game I'd buy all by itself -- especially if they're zombie clowns. I smell spin-off franchise.

What do you think of the Achievement list for "Left 4 Dead 2"? Looking forward to messing with some clowns? Share your thoughts in the comment section below.