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50 of 69 (72%) achievements earned:
Personal Achievements
 

Submissive

Put the can in the trash.
Unlocked 29 Aug, 2011 @ 7:41pm

Malcontent

Escape the apartment block raid.
Unlocked 29 Aug, 2011 @ 7:49pm

Trusty Hardware

Get the crowbar.
Unlocked 29 Aug, 2011 @ 8:01pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 29 Aug, 2011 @ 8:18pm

Anchor's Aweigh!

Get the airboat.
Unlocked 29 Aug, 2011 @ 8:58pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 30 Aug, 2011 @ 1:51am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 30 Aug, 2011 @ 2:17am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 30 Aug, 2011 @ 2:53am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 30 Aug, 2011 @ 2:54am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 30 Aug, 2011 @ 3:56am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 30 Aug, 2011 @ 4:41am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 30 Aug, 2011 @ 4:54am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 30 Aug, 2011 @ 4:33am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 1 Sep, 2011 @ 6:18pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 1 Sep, 2011 @ 6:33pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 2 Sep, 2011 @ 11:44pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 3 Sep, 2011 @ 12:02am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 3 Sep, 2011 @ 12:31am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 3 Sep, 2011 @ 12:51am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 3 Sep, 2011 @ 1:42am

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 3 Sep, 2011 @ 2:13am

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 3 Sep, 2011 @ 2:31am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 3 Sep, 2011 @ 3:04am

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 2 Sep, 2011 @ 11:42pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 22 Nov @ 12:13am

Containment

Contain the Citadel core.
Unlocked 22 Nov @ 12:13am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 22 Nov @ 12:13am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 22 Nov @ 12:13am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 22 Nov @ 12:13am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 22 Nov @ 12:13am

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 22 Nov @ 12:13am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 22 Nov @ 12:13am

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Unlocked 22 Nov @ 12:13am

Zombie-que

Use flares to light 15 zombies on fire.
Unlocked 22 Nov @ 12:13am

Acid Reflex

Kill an acid antlion worker.
Unlocked 22 Nov @ 12:13am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 22 Nov @ 12:13am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 22 Nov @ 12:13am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 22 Nov @ 12:13am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 22 Nov @ 12:13am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 22 Nov @ 12:13am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 22 Nov @ 12:13am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 22 Nov @ 12:13am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 22 Nov @ 12:13am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 22 Nov @ 12:13am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 22 Nov @ 12:13am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 22 Nov @ 12:13am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 22 Nov @ 12:13am

Hot Potat0wned

Kill a Combine soldier with his own grenade.
Unlocked 22 Nov @ 12:13am

Grave Robber

Steal a Zombine's grenade.
Unlocked 22 Nov @ 12:13am

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 22 Nov @ 12:13am



What cat?

Break the mini-teleporter in Kleiner's lab.

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Two Points

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

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.

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.

Conservationist

Kill five enemies with the same energy ball.

Think Fast!

Kill an Elite Soldier with his own energy ball.

Get Some Grub

Squish every antlion grub in Episode Two.

Piñata Party

Find and break every web cache 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.

Bone Breaker

Kill 30 enemies with thrown physics objects.
+1

1 hidden achievement remaining

Details for each achievement will be revealed once unlocked