Don't ask where I found them :P

The Orange Box Achievements

Acid Reflex
Kill an acid antlion worker.
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Bone Breaker
Kill 30 enemies with thrown physics objects.
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Deadly Harvest
Kill an enemy by planting a hopper mine.
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Hack Attack!
Kill five enemies with a Manhack.
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Hot PotatOwned
Kill a Combine soldier with his own grenade.
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Conservationist
Kill five enemies with the same energy ball.
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Think Fast!
Kill an Elite Soldier with his own energy ball.
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Grave Robber
Steal a Zombine's grenade.
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Zombie-que
Use flares to light 15 zombies on fire.
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Malcontent
Escape the apartment block raid.
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What cat?
Break the mini-teleporter in Kleiner's lab.
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Trusty Hardware
Get the crowbar.
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Barnacle Bowling
Kill five barnacles with one barrel.
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Anchor's Aweigh!
Get the airboat.
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Heavy Weapons
Get the airboat's mounted gun.
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Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
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Revenge!
Destroy the hunter-chopper in Half-Life 2.
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Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
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Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
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Two Points
Use DOG's ball to make a basket in Eli's scrapyard.
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Zombie Chopper
Play through Ravenholm using only the Gravity Gun.
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OSHA Violation
Kill 3 enemies using the crane.
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Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17.
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One Man Army
Destroy six gunships in Half-Life 2.
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Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
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Bug Hunt
Use the antlions to kill 50 enemies.
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Flushed
Kill an enemy with a toilet.
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Warden Freeman
Survive the second turret standoff in Nova Prospekt.
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"Radiation Levels Detected"
Get through the toxic tunnel under City 17 in Half-Life 2.
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Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
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Counter-Sniper
Kill all of the snipers in City 17.
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Fight the Power
Shut down the supression device by disabling its generators.
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Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
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Lambda Locator
Find all lambda caches in Half-Life 2.
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Watch Your Head!
Make it to the bottom of the Citadel's main elevator shaft in one piece.
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Containment
Contain the Citadel core.
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Pacifist
Contain the Citadel core without killing any stalkers.
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Car Crusher
Use the cars to squash 15 antlions in Episode One.
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Elevator Action
Survive long enough to get on the parking garage elevator.
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Live Bait
Help Alyx snipe 30 enemies in Episode One.
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Attica!
Destroy the gunship in the hospital attic.
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Citizen Escort
Don't let any citizens die when escorting them to the escape train.
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Escape From City 17
Escape City 17 with Alyx.
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The One Free Bullet
Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!
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Get Some Grub
Squish every antlion grub in Episode Two.
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Pinata Party
Find and break every web cache in Episode Two.
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Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
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Hit and Run
Run over 20 enemies with the car in Episode Two.
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Puttin' On a Clinic
Defeat the chopper in Episode Two without any misses.
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Cache Checker
Find every radar cache in chapter Under The Radar.
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Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar.
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Pedal to the Metal
Beat DOG in a race to the White Forest base.
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Little Rocket Man
Send the garden gnome into space.
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Neighborhood Watch
Save all buildings outside the missile silo from destruction.
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Payback
Kill a Hunter with its own flechettes.
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Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device.
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Fratricide
Do whatever it takes to survive.
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Partygoer
Make the correct party escort submission position decision.
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Heartbreaker
Complete Portal.
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Terminal Velocity
Fall 30,000 feet.
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Long Jump
Jump 300 feet.
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Cupcake
Beat two Portal advanced maps.
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Fruitcake
Beat four Portal advanced maps.
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Vanilla Crazy Cake
Beat all six Portal advanced maps.
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Basic Science
Earn bronze medals on all Portal challenges.
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Rocket Science
Earn silver medals on all Portal challenges.
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Aperture Science
Earn gold medals on all Portal challenges.
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Turret
Accumulate 10 turret kills with a single turret.
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Nemesis
Get five revenge kills.
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Hard to Kill
Get five kills in a row without dying.
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Master of Disguise
Trick an opposing medic into healing you.
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With Friends Like these...
Play in a game with seven or more players from your friends list.
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Dynasty
Win 20 games.
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Hardcore
Accumulate 1000 total kills.
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Powerhouse Offense
Win 2Fort with a shutout.
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Lightning Offense
Win Well in 5 minutes or less.
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Relentless Offense
Win Hydro without giving up a capture.
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Impenetrable Defense
Successfully defend Dustbowl without giving up a capture.
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Impossible Defense
Successfully defend Gravel Pit without giving up a capture.
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Head of the Class
Play a complete round with every class.
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World Traveler
Play a complete game on every map.
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Team Doctor
Accumulate 25000 heal points as a Medic.
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Flamethrower
Set five enemies on fire in 30 seconds.
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Grey Matter
Get 25 headshots as a Sniper.
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Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
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Follow Freeman
Gain command of a squad of rebels in the uprising.
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Camera Shy
Detach security cameras from the walls.
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Friendly Fire
Knock down a turret with another turret.
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Secret Achievement
Continue playing to unlock this secret achievement.
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Secret Achievement
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Secret Achievement
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Secret Achievement
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Secret Achievement
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Secret Achievement
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Secret Achievement
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Secret Achievement
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Secret Achievement
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Secret Achievement
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Secret Achievement
Continue playing to unlock this secret achievement.