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There's someone in my house eating my birthday cake Keep your house undamaged for 5 minutes in Commando mode

Hat-trick Hero Awarded for scoring 5 hat-tricks.

Indirect Fire Kill 100 zombies with traps in Infection.

Don't You Die On Me Revive a teammate in Co-Op Campaign or Endgame

Information Overload Find all 8 Protocol Data Drives

Baron Bashing Defeat Commander Byron Baron once.

Party Started Complete a song on any difficulty in split screen.

Invincible Win a match in under 2:05 minutes (except in Arena Mode).

Wheat From Chaff Gain 25 PERFECT medals

Last Gasp Winner Awarded for scoring the Winner in Stoppage Time.

Predatory Striker Awarded for playing over 20 Matches, averaging 2 plus goals per Match in your last 5.

Double A Get an "A Rank" on 10 levels.

It's a Secret to Everybody Find all secret areas in the caves.

The Volunteer Make contact with the Ethereal hive mind.

Construction Complete As host, collect all nine artifacts in Part 2

Assault With Battery In Zetsubou No Shima, electrocute a zombie with a shield.

Extermination Addict Play 100 public matches of Extermination

Oppenheimer Staff the Research Labs with 80 scientists.

Jungle Hostage Missions Unlock all 4 hostages in Jungliana in Part 2

Little Brother's Helper As Pointman, kill 100 enemies suspended by Fettel

Iron Breakers Complete the full Operation Iron Horse raid in a group of eight players.

Vaporeyezed In Gorod Krovi, use the Gigant Beam to kill 20 Zombies in one activation.

I F.E.A.R. Nothing! Finish a wave of Contractions on INSANE without anyone going into Last Stand

It's a Legitimate Strategy Get 3 Kills while defending an Objective Zone without leaving it

Left Fork Dead End Find the Secret in Act 5.

Half Minute Hexapod Defeat the swinging hexapod, once you see its health bar, in under 30 seconds in Chapter 5

CvS Master Win 25 public matches of Creatures Vs. Soldiers

Risk Assessment Finished an episode with at least 1 modifier turned on

The Search and Rescue Strikeforce As host, complete a rescue mission for all four locations in Part 2

Death From Above Kill the Monster while in mid-air outside of the Tutorials.

Tower Sweeper Completed every side quest in the Vimmark Mountains prison tower. ("Legacy" downloadable content)

Kill Switch Destroy 10 relay beacons.

If You Build It, They Will Come Have 6 Improvements at one time.

Decimation Destroy 500 machines.

One Shot Destroy a Hunter with a single shot.

Escort Service Put two units into a formation

European Champions Awarded when you win the UEFA Champions League.

Cryogenic Slumber Party In Moon, complete Richtofen's Grand Scheme.

Capital Punishment Complete all Crime and Punishment Challenges.

Pacifist Win a round without picking up the ball

Unstoppable Completed Shore Leave on Hardcore difficulty

A Revolution Without Dancing Change your government

First Taste of Victory Clear a game.

Some tomatoes for her Provide tomatoes to the hungry lady in Downtown streets level

Grind it Out Win a match with 10 men Online or when playing on Professional difficulty or higher

Intuition and Execution Win a penalty shoot-out without missing

Family Outing Completed the main quest in the Vimmark Mountains with Bethany or Carver in the party. ("Legacy" downloadable content)

I'm not a Doctor, I'm a Medic! Perform 50 revives in any game mode

Sharp Shooter Attain a 80% or higher accuracy score on a mission in Part 2

Hasta La Vista Baby Destroy 30 Seekers.