F0ggie

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.

Little Rocket Man

Send the garden gnome into space.

Neighborhood Watch

Save all buildings outside the missile silo from destruction.

Fratricide

Do whatever it takes to survive.

Partygoer

Make the correct party escort submission position decision.

Heartbreaker

Complete Portal.

Long Jump

Jump 300 feet.

Cupcake

Beat two Portal advanced maps.

Fruitcake

Beat four Portal advanced maps.

Vanilla Crazy Cake

Beat all six Portal advanced maps.

Basic Science

Earn bronze medals on all Portal challenges.

Rocket Science

Earn silver medals on all Portal challenges.

Aperture Science

Earn gold medals on all Portal challenges.

Camera Shy

Detach security cameras from the walls.

Friendly Fire

Knock down a turret with another turret.

Zombie-que

Use flares to light 15 zombies on fire.

What cat?

Break the mini-teleporter in Kleiner's lab.

Barnacle Bowling

Kill five barnacles with one barrel.

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.

Flushed

Kill an enemy with a toilet.

Counter-Sniper

Kill all of the snipers in City 17.

Lambda Locator

Find all lambda caches in Half-Life 2.

Pacifist

Contain the Citadel core without killing any stalkers.

The One Free Bullet

Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!

Get Some Grub

Squish every antlion grub in Episode Two.

Pinata Party

Find and break every web cache in Episode Two.

Hard to Kill

Get five kills in a row without dying.

Secret Achievement

Terminal Velocity

Fall 30,000 feet.

Secret Achievement

Hit and Run

Run over 20 enemies with the car in Episode Two.

Secret Achievement

Secret Achievement

Cache Checker

Find every radar cache in chapter Under The Radar.

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.

Pedal to the Metal

Beat DOG in a race to the White Forest base.

Secret Achievement

Secret Achievement

Payback

Kill a Hunter with its own flechettes.

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.

Escape From City 17

Escape City 17 with Alyx.

Acid Reflex

Kill an acid antlion worker.

Attica!

Destroy the gunship in the hospital attic.

Citizen Escort

Don't let any citizens die when escorting them to the escape train.

Car Crusher

Use the cars to squash 15 antlions in Episode One.

Elevator Action

Survive long enough to get on the parking garage elevator.

Live Bait

Help Alyx snipe 30 enemies in Episode One.

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.

Hack Attack!

Kill five enemies with a Manhack.

Conservationist

Kill five enemies with the same energy ball.

Think Fast!

Kill an Elite Soldier with his own energy ball.

Grave Robber

Steal a Zombine's grenade.

Secret Achievement

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.

Secret Achievement

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.

Containment

Contain the Citadel core.

Follow Freeman

Gain command of a squad of rebels in the uprising.

Deadly Harvest

Kill an enemy by planting a hopper mine.

Warden Freeman

Survive the second turret standoff in Nova Prospekt.

"Radiation Levels Detected"

Get through the toxic tunnel under City 17 in Half-Life 2.

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.

Fight the Power

Shut down the supression device by disabling its generators.

Hot PotatOwned

Kill a Combine soldier with his own grenade.

One Man Army

Destroy six gunships in Half-Life 2.

Bug Hunt

Use the antlions to kill 50 enemies.

Lab Rat

Acquire the fully powered Aperture Science Handheld Portal Device.

Bone Breaker

Kill 30 enemies with thrown physics objects.

Secret Achievement

Malcontent

Escape the apartment block raid.

Trusty Hardware

Get the crowbar.

Anchor's Aweigh!

Get the airboat.

Heavy Weapons

Get the airboat's mounted gun.

Revenge!

Destroy the hunter-chopper in Half-Life 2.

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.

Secret Achievement

OSHA Violation

Kill 3 enemies using the crane.

Secret Achievement

Turret

Accumulate 10 turret kills with a single turret.

Nemesis

Get five revenge kills.

Master of Disguise

Trick an opposing medic into healing you.

With Friends Like these...

Play in a game with seven or more players from your friends list.

Dynasty

Win 20 games.

Hardcore

Accumulate 1000 total kills.

Powerhouse Offense

Win 2Fort with a shutout.

Lightning Offense

Win Well in 5 minutes or less.

Relentless Offense

Win Hydro without giving up a capture.

Impenetrable Defense

Successfully defend Dustbowl without giving up a capture.

Impossible Defense

Successfully defend Gravel Pit without giving up a capture.

Head of the Class

Play a complete round with every class.

World Traveler

Play a complete game on every map.

Team Doctor

Accumulate 25000 heal points as a Medic.

Flamethrower

Set five enemies on fire in 30 seconds.

Grey Matter

Get 25 headshots as a Sniper.