As a Special Infected, incap someone who is trying to sacrifice themselves.
Have all 3 generators running at once in "The Sacrifice" finale.
Have Bill sacrifice himself for the team.
Complete "The Sacrifice".
Kill a Special Infected with an exploding barrel.
Play 6 Mutations.
Open 5 foot lockers.
Collect 10 items dropped by a Fallen Survivor.
Using the M60, kill 25 infected without letting go of the trigger.
Kill a Tank only with damage from the original Survivors.
Play 5 full games of Scavenge on The Port.
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
Survive The Passing Campaign.
Knock off the heads of 18 infected with the golf club.
Play the new Midnight Riders song on a jukebox.
Cross the bridge finale in less than three minutes.
Kill a Charger with a melee weapon while they are charging.
As the Charger, grab a Survivor and carry them over 80 feet.
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 Jockey, ride a Survivor and steer them into a Spitter's acid patch.
As the Spitter, spit on a Survivor being choked by a Smoker.
Rescue Gnome Chompski from the Carnival.
Using a Molotov, burn a Clown leading at least 10 Common Infected.
Navigate the sugar mill and reach the safe room without killing any Witches.
In a Versus round, leave the saferoom to defibrillate a dead teammate.
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
Revive 10 dead Survivors with the defibrillator.
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
Kill 10 swampy Mudmen while they are in the water.
In a Survival round, get a medal only using melee weapons.
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
Finish a campaign using only melee weapons.
Cause 25 gas can drops as a Special Infected.
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
Ignite 50 Common Infected with incendiary ammo.
Kill a Tank with melee weapons.
Survive the Hard Rain campaign.
Survive all campaigns on Expert.
Kill one of each Uncommon Infected.
Defend yourself at the crashed airliner without taking damage.
Survive the Swamp Fever campaign.
Kill 15 Infected with a single grenade launcher blast.
Kill a Jockey within 2 seconds of it jumping on a Survivor.
Honk the noses of 10 Clowns.
Collect 100 gas cans in Scavenge.
As the Spitter, hit every Survivor with a single acid patch.
Win a game of Scavenge.
Stop the enemy team from collecting any gas cans during a Scavenge round.
Make a Survivor drop a gas can during overtime.
Collect 15 gas cans in a single Scavenge round.
Survive the Dark Carnival campaign.
Survive the Parish campaign.
Use every melee weapon to kill Common Infected.
Kill 100 Common Infected with the chainsaw.
As the Jockey, ride the Survivors twice in a single life.
As the Jockey, ride a Survivor for more than 12 seconds.
Use a bile bomb on a Tank.
Decapitate 200 Infected with a melee weapon.
Prove you are faster than Moustachio.
Prove you are stronger than Moustachio.
Deploy an ammo upgrade and have your team use it.
Survive the Dead Center campaign.
Survive a campaign on Expert skill with Realism mode enabled.
Kill a Spitter before she is able to spit.
