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69 of 69 (100%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 23 Apr, 2022 @ 2:03pm

Submissive

Put the can in the trash.
Unlocked 23 Apr, 2022 @ 2:03pm

Malcontent

Escape the apartment block raid.
Unlocked 23 Apr, 2022 @ 2:09pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 23 Apr, 2022 @ 2:13pm

Trusty Hardware

Get the crowbar.
Unlocked 23 Apr, 2022 @ 2:20pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 1 Jun, 2022 @ 12:49pm

Anchor's Aweigh!

Get the airboat.
Unlocked 1 Jun, 2022 @ 1:30pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 1 Jun, 2022 @ 2:27pm

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 1 Jun, 2022 @ 2:46pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 1 Jun, 2022 @ 2:40pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 2 Jun, 2022 @ 12:45pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 2 Jun, 2022 @ 12:45pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 2 Jun, 2022 @ 12:50pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 2 Jun, 2022 @ 2:13pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 2 Jun, 2022 @ 2:01pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 2 Jun, 2022 @ 2:52pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 2 Jun, 2022 @ 3:09pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 2 Jun, 2022 @ 2:43pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 3 Jun, 2022 @ 2:59pm

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 3 Jun, 2022 @ 2:19pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 3 Jun, 2022 @ 2:46pm

Flushed

Kill an enemy with a toilet.
Unlocked 3 Jun, 2022 @ 3:09pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 3 Jun, 2022 @ 4:25pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 4 Jun, 2022 @ 1:06pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 4 Jun, 2022 @ 1:44pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 4 Jun, 2022 @ 2:16pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 4 Jun, 2022 @ 2:49pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 4 Jun, 2022 @ 3:18pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 4 Jun, 2022 @ 4:04pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 4 Jun, 2022 @ 4:30pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 4 Jun, 2022 @ 4:46pm

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked 4 Jun, 2022 @ 3:52pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 4 Jun, 2022 @ 1:40pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 19 Nov @ 3:44am

Containment

Contain the Citadel core.
Unlocked 19 Nov @ 3:56am

Pacifist

Contain the Citadel core without killing any stalkers.
Unlocked 19 Nov @ 3:56am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 19 Nov @ 4:18am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 19 Nov @ 4:32am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 19 Nov @ 4:42am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 19 Nov @ 5:09am

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 19 Nov @ 5:33am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 19 Nov @ 5:40am

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Unlocked 19 Nov @ 5:40am

Conservationist

Kill five enemies with the same energy ball.
Unlocked 19 Nov @ 3:58am

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 19 Nov @ 5:13am

Zombie-que

Use flares to light 15 zombies on fire.
Unlocked 19 Nov @ 4:31am

Acid Reflex

Kill an acid antlion worker.
Unlocked 20 Nov @ 11:43am

Get Some Grub

Squish every antlion grub in Episode Two.
Unlocked 20 Nov @ 1:29pm

Piñata Party

Find and break every web cache in Episode Two.
Unlocked 20 Nov @ 1:16pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 20 Nov @ 12:17pm

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 20 Nov @ 1:34pm

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 22 Nov @ 6:40am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 21 Nov @ 12:08pm

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.
Unlocked 21 Nov @ 12:44pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 22 Nov @ 6:32am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 22 Nov @ 7:06am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 22 Nov @ 7:12am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 22 Nov @ 6:38am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 22 Nov @ 6:58am

Little Rocket Man

Send the garden gnome into space.
Unlocked 22 Nov @ 7:21am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 22 Nov @ 7:31am

Neighborhood Watch

Save all buildings outside the missile silo from destruction.
Unlocked 22 Nov @ 8:13am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 22 Nov @ 8:13am

Payback

Kill a Hunter with its own flechettes.
Unlocked 21 Nov @ 12:07pm

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 20 Nov @ 12:45pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 20 Nov @ 12:07pm

Hot Potat0wned

Kill a Combine soldier with his own grenade.
Unlocked 22 Nov @ 6:30am

Grave Robber

Steal a Zombine's grenade.
Unlocked 20 Nov @ 12:33pm

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 19 Nov @ 3:11am