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49 of 69 (71%) achievements earned:
Personal Achievements
 

Submissive

Put the can in the trash.
Unlocked 3 Sep, 2011 @ 6:49pm

Malcontent

Escape the apartment block raid.
Unlocked 3 Sep, 2011 @ 6:55pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 2 Feb, 2012 @ 7:40pm

Trusty Hardware

Get the crowbar.
Unlocked 3 Sep, 2011 @ 7:06pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 3 Sep, 2011 @ 7:28pm

Anchor's Aweigh!

Get the airboat.
Unlocked 8 Sep, 2011 @ 3:08am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 10 Jan @ 3:01am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 16 Sep, 2011 @ 12:10am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 16 Sep, 2011 @ 12:26am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 16 Sep, 2011 @ 12:26am

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 6 Apr, 2012 @ 11:54pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 23 Sep, 2011 @ 7:33pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 24 Sep, 2011 @ 5:38pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 10 Jan @ 8:05am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 24 Sep, 2011 @ 5:28pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 26 Sep, 2011 @ 12:05am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 26 Sep, 2011 @ 5:27pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 26 Sep, 2011 @ 9:39pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 26 Sep, 2011 @ 11:07pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 27 Sep, 2011 @ 5:59pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 27 Sep, 2011 @ 6:57pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 3 Apr, 2012 @ 4:57pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 27 Sep, 2011 @ 8:00pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 27 Sep, 2011 @ 8:27pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 11 Jan @ 5:47am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 27 Sep, 2011 @ 9:13pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 11 Jan @ 1:09am

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 11 Jan @ 6:59am

Containment

Contain the Citadel core.
Unlocked 11 Jan @ 7:04am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 11 Jan @ 7:49am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 11 Jan @ 7:46am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 11 Jan @ 7:48am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 11 Jan @ 8:33am

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 11 Jan @ 9:07am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 11 Jan @ 9:07am

Acid Reflex

Kill an acid antlion worker.
Unlocked 11 Jan @ 11:26pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 11 Jan @ 11:45pm

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 12 Jan @ 12:34am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 12 Jan @ 1:17am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 12 Jan @ 1:57am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 12 Jan @ 2:16am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 12 Jan @ 2:21am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 12 Jan @ 1:57am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 12 Jan @ 2:12am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 12 Jan @ 2:38am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 12 Jan @ 3:26am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 12 Jan @ 12:51am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 11 Jan @ 11:38pm

Gnome Alone

If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space. If you did not also receive the achievement 'Manufacturing Ascent', Newell has abandoned his plans to shoot Noam Chomsky into space.
Unlocked 11 Jan @ 9:11am



Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.

Keep Off the Sand!

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

Flushed

Kill an enemy with a toilet.

Lambda Locator

Find all lambda caches in Half-Life 2.

Pacifist

Contain the Citadel core without killing any stalkers.

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!

Conservationist

Kill five enemies with the same energy ball.

Think Fast!

Kill an Elite Soldier with his own energy ball.

Zombie-que

Use flares to light 15 zombies on fire.

Get Some Grub

Squish every antlion grub in Episode Two.

Piñata Party

Find and break every web cache in Episode Two.

Hit and Run

Run over 20 enemies with the car in Episode Two.

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.

Payback

Kill a Hunter with its own flechettes.

Hot Potat0wned

Kill a Combine soldier with his own grenade.

Grave Robber

Steal a Zombine's grenade.
+1

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