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