The Orange Box

Bone Breaker
Uncommon

Kill 30 enemies with thrown physics objects.

Deadly Harvest
Uncommon

Kill an enemy by planting a hopper mine.

Hack Attack!
Rare
Hot PotatOwned
Rare

Kill a Combine soldier with his own grenade.

Conservationist
Rare

Kill five enemies with the same energy ball.

Think Fast!
Rare

Kill an Elite Soldier with his own energy ball.

Zombie-que
Ultra Rare

Use flares to light 15 zombies on fire.

Defiant
Uncommon

Defiant

5 Secret

Hit the trashcan cop with the can.

Submissive
Common
Malcontent
Common
What cat?
Uncommon

Break the mini-teleporter in Kleiner's lab.

Barnacle Bowling
Uncommon
Heavy Weapons
Common
Vorticough
Rare

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Revenge!
Common

Destroy the hunter-chopper in Half-Life 2.

Blast from the Past
Rare

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

Zero-Point Energy
Common

Get the Gravity Gun in Black Mesa East.

Two Points
Rare

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

Zombie Chopper
Rare

Play through Ravenholm using only the Gravity Gun.

Hallowed Ground
Uncommon

Hallowed Ground

5 Secret

Escort Gregori safely through the church cemetery.

OSHA Violation
Uncommon
Targetted Advertising
Rare

Pin a soldier to the billboard in chapter Highway 17.

Where Cubbage Fears to Tread
Uncommon

Defend Little Odessa from the gunship attack.

One Man Army
Uncommon

Destroy six gunships in Half-Life 2.

Keep Off the Sand!
Rare

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

Bug Hunt
Uncommon

Use the antlions to kill 50 enemies.

Flushed
Rare
Warden Freeman
Uncommon

Survive the second turret standoff in Nova Prospekt.

"Radiation Levels Detected"
Uncommon

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

Plaza Defender
Uncommon

Survive the generator plaza standoff in chapter Anticitizen One.

Counter-Sniper
Rare

Kill all of the snipers in City 17.

Fight the Power
Uncommon

Shut down the supression device by disabling its generators.

Giant Killer
Uncommon

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

Singularity Collapse
Uncommon

Destroy the Citadel's reactor core.

Lambda Locator
Ultra Rare

Find all lambda caches in Half-Life 2.

Watch Your Head!
Uncommon

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

Pacifist
Rare

Contain the Citadel core without killing any stalkers.

Car Crusher
Rare

Use the cars to squash 15 antlions in Episode One.

Elevator Action
Uncommon

Survive long enough to get on the parking garage elevator.

Live Bait
Rare

Help Alyx snipe 30 enemies in Episode One.

Attica!
Rare

Destroy the gunship in the hospital attic.

Citizen Escort
Rare

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

The One Free Bullet
Rare

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

Acid Reflex
Uncommon
Get Some Grub
Ultra Rare

Squish every antlion grub in Episode Two.

Pinata Party
Rare

Find and break every web cache in Episode Two.

Into the Breach
Uncommon

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

Twofer
Rare

Twofer

5 Secret

Defeat both antlion guards outside the White Forest.

Hit and Run
Rare

Run over 20 enemies with the car in Episode Two.

Meet the Hunters
Rare

Meet the Hunters

10 Secret

Survive the Hunter ambush with Alyx.

Puttin' On a Clinic
Ultra Rare

Defeat the chopper in Episode Two without any misses.

Gunishment!
Rare

Gunishment!

5 Secret

Destroy the Combine cannon in the junkyard.

Cache Checker
Rare

Find every radar cache in chapter Under The Radar.

Gordon Propelled Rocket
Rare

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

Pedal to the Metal
Rare

Beat DOG in a race to the White Forest base.

Quiet Mountain Getaway
Rare

Survive the ambush at White Forest Inn.

Little Rocket Man
Ultra Rare
Secondary Silo Secured
Rare

Secure the launch doors on missile silo 2.

Neighborhood Watch
Ultra Rare

Save all buildings outside the missile silo from destruction.

Defense of the Armament
Rare

Save the missile silo from the Combine offensive.

Payback
Rare

Payback

10

Kill a Hunter with its own flechettes.

Lab Rat
Common

Acquire the fully powered Aperture Science Handheld Portal Device.

Fratricide
Common
Partygoer
Uncommon

Make the correct party escort submission position decision.

Cupcake
Rare

Cupcake

10

Beat two Portal advanced maps.

Fruitcake
Rare

Beat four Portal advanced maps.

Vanilla Crazy Cake
Rare
Basic Science
Ultra Rare

Earn bronze medals on all Portal challenges.

Rocket Science
Ultra Rare

Earn silver medals on all Portal challenges.

Aperture Science
Ultra Rare

Earn gold medals on all Portal challenges.

Turret
Rare

Turret

5

Accumulate 10 turret kills with a single turret.

Hard to Kill
Rare

Get five kills in a row without dying.

Master of Disguise
Rare

Trick an opposing medic into healing you.

With Friends Like these...
Ultra Rare

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

Hardcore
Ultra Rare
Relentless Offense
Rare

Win Hydro without giving up a capture.

Impenetrable Defense
Rare

Successfully defend Dustbowl without giving up a capture.

Impossible Defense
Rare

Successfully defend Gravel Pit without giving up a capture.

Head of the Class
Rare

Play a complete round with every class.

World Traveler
Rare
Team Doctor
Rare

Accumulate 25000 heal points as a Medic.

Flamethrower
Rare

Set five enemies on fire in 30 seconds.

Atomizer
Rare

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

Follow Freeman
Uncommon

Gain command of a squad of rebels in the uprising.

Camera Shy
Ultra Rare

Detach security cameras from the walls.

Friendly Fire
Uncommon

Knock down a turret with another turret.

99
1,000
2,519
309
150
Platforms
Xbox 360