Left 4 Dead 2 achievements

With a sharp melee weapon, cut a Smoker's tongue before he ensnares you.

As the Boomer, vomit on a Survivor without having direct line of sight with them.

Earn a bronze medal on any official Survival map.

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

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

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

Survive all campaigns on Expert.

Form a team and beat an enemy team in 4v4 Versus or Scavenge.

Play 5 full games of Scavenge on The Port.

Survive a campaign on Expert skill with Realism mode enabled.

Cause 25 gas can drops as a Special Infected.

Collect 100 gas cans in Scavenge.