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51 of 69 (74%) achievements earned:
Personal Achievements
 

Submissive

Put the can in the trash.
Unlocked 16 Nov @ 12:28pm

Malcontent

Escape the apartment block raid.
Unlocked 16 Nov @ 12:42pm

Trusty Hardware

Get the crowbar.
Unlocked 16 Nov @ 1:04pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 16 Nov @ 1:21pm

Anchor's Aweigh!

Get the airboat.
Unlocked 16 Nov @ 1:57pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 16 Nov @ 2:42pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 16 Nov @ 2:53pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 16 Nov @ 3:09pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 17 Nov @ 12:24pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 17 Nov @ 1:41pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 17 Nov @ 1:12pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 18 Nov @ 12:24pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 18 Nov @ 12:14pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 19 Nov @ 1:39pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 19 Nov @ 1:58pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 19 Nov @ 2:23pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 19 Nov @ 2:51pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 19 Nov @ 3:32pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 19 Nov @ 4:27pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 19 Nov @ 4:57pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 19 Nov @ 5:48pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 20 Nov @ 10:53am

Containment

Contain the Citadel core.
Unlocked 20 Nov @ 11:19am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 20 Nov @ 12:19pm

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 20 Nov @ 12:32pm

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 20 Nov @ 12:51pm

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 20 Nov @ 3:07pm

Escape From City 17

Escape City 17 with Alyx.
Unlocked 20 Nov @ 3:07pm

Acid Reflex

Kill an acid antlion worker.
Unlocked 20 Nov @ 3:52pm

Get Some Grub

Squish every antlion grub in Episode Two.
Unlocked 20 Nov @ 5:53pm

Piñata Party

Find and break every web cache in Episode Two.
Unlocked 20 Nov @ 5:37pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 20 Nov @ 4:25pm

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 20 Nov @ 6:05pm

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 21 Nov @ 5:44am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 21 Nov @ 5:03am

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.
Unlocked 21 Nov @ 5:14am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 21 Nov @ 5:38am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 21 Nov @ 6:44am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 21 Nov @ 6:54am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 21 Nov @ 5:45am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 21 Nov @ 6:36am

Little Rocket Man

Send the garden gnome into space.
Unlocked 22 Nov @ 11:03am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 22 Nov @ 11:21am

Neighborhood Watch

Save all buildings outside the missile silo from destruction.
Unlocked 22 Nov @ 12:27pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 22 Nov @ 12:27pm

Payback

Kill a Hunter with its own flechettes.
Unlocked 21 Nov @ 6:36am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 21 Nov @ 3:16am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 20 Nov @ 4:14pm

Hot Potat0wned

Kill a Combine soldier with his own grenade.
Unlocked 21 Nov @ 5:03am

Grave Robber

Steal a Zombine's grenade.
Unlocked 20 Nov @ 5:11pm

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 20 Nov @ 3:11pm



What cat?

Break the mini-teleporter in Kleiner's lab.

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.

Atomizer

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

Lambda Locator

Find all lambda caches in Half-Life 2.

Hack Attack!

Kill five enemies with a Manhack.

Pacifist

Contain the Citadel core without killing any stalkers.

Attica!

Destroy the gunship in the hospital attic.

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.
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