Left 4 Dead 2

Kill a Spitter before she is able to spit.

Deploy an ammo upgrade and have your team use it.

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

Survive the Dead Center campaign.

Kill one of each Uncommon Infected.

Use a bile bomb on a Tank.

Decapitate 200 Infected with a melee weapon.

Survive the Dark Carnival campaign.

Kill 100 Common Infected with the chainsaw.

Survive the Hard Rain campaign.

Survive the Swamp Fever campaign.

Survive the Parish campaign.

Use every melee weapon to kill Common Infected.

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

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

Ignite 50 Common Infected with incendiary ammo.

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

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

Honk the noses of 10 Clowns.

Kill 10 swampy Mudmen while they are in the water.

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

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

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

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

Kill 15 Infected with a single grenade launcher blast.

Prove you are faster than Moustachio.

Win a game of Scavenge.

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

Rescue Gnome Chompski from the Carnival.

Prove you are stronger than Moustachio.

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

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

Survive The Passing Campaign.

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

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

Make a Survivor drop a gas can during overtime.

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

Finish a campaign using only melee weapons.

Play the new Midnight Riders song on a jukebox.

Kill a Tank with melee weapons.

Defend yourself at the crashed airliner without taking damage.

Knock off the heads of 18 infected with the golf club.

Cross the bridge finale in less than three minutes.

Complete "The Sacrifice".

Open 5 foot lockers.

Collect 10 items dropped by a Fallen Survivor.

Collect 15 gas cans in a single Scavenge round.

Revive 10 dead Survivors with the defibrillator.

Have Bill sacrifice himself for the team.

Kill a Tank only with damage from the original Survivors.

Using the M60, kill 25 infected without letting go of the trigger.

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

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

Cause 25 gas can drops as a Special Infected.

Play 6 Mutations.

Collect 100 gas cans in Scavenge.

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.

Survive a campaign on Expert skill with Realism mode enabled.

Kill a Special Infected with an exploding barrel.

Have all 3 generators running at once in "The Sacrifice" finale.

Play 5 full games of Scavenge on The Port.

Survive all campaigns on Expert.

As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.

As a Special Infected, incap someone who is trying to sacrifice themselves.