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44 of 69 (64%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 8 May, 2017 @ 5:10am

Submissive

Put the can in the trash.
Unlocked 24 Nov @ 5:47am

Malcontent

Escape the apartment block raid.
Unlocked 8 May, 2017 @ 5:22am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 11 May, 2017 @ 12:50am

Trusty Hardware

Get the crowbar.
Unlocked 8 May, 2017 @ 5:38am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 24 Nov @ 6:19am

Anchor's Aweigh!

Get the airboat.
Unlocked 5 Dec @ 4:58am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 8 May, 2017 @ 6:48am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 8 May, 2017 @ 11:40pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 8 May, 2017 @ 11:52pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 11 May, 2017 @ 12:57am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 9 May, 2017 @ 1:03am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 11 May, 2017 @ 2:29am

Flushed

Kill an enemy with a toilet.
Unlocked 11 May, 2017 @ 2:22am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 22 Nov, 2019 @ 2:47pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 17 May @ 11:37am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 17 May @ 11:52am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 17 May @ 12:08pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 16 Nov @ 2:11am

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 16 Nov @ 11:29am

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 16 Nov @ 11:54am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 16 Nov @ 1:57pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 17 Nov @ 6:19am

Containment

Contain the Citadel core.
Unlocked 17 Nov @ 6:31am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 19 Nov @ 10:54am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 19 Nov @ 11:04am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 19 Nov @ 11:19am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 19 Nov @ 11:41am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 20 Nov @ 5:42am

Acid Reflex

Kill an acid antlion worker.
Unlocked 20 Nov @ 6:05am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 20 Nov @ 6:24am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 20 Nov @ 7:20am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 21 Nov @ 4:44am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 20 Nov @ 10:11am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 20 Nov @ 10:32am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 20 Nov @ 10:49am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 20 Nov @ 10:54am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 20 Nov @ 10:36am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 20 Nov @ 10:45am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 21 Nov @ 4:27am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 21 Nov @ 4:53am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 20 Nov @ 10:00am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 20 Nov @ 6:18am

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 @ 5:44am



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.

OSHA Violation

Kill 3 enemies using the crane.

One Man Army

Destroy six gunships in Half-Life 2.

Keep Off the Sand!

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

Counter-Sniper

Kill all of the snipers in City 17.

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.

Citizen Escort

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

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.

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

1 hidden achievement remaining

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