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

Defiant

Hit the trashcan cop with the can.
Unlocked 30 Nov, 2024 @ 1:37pm

Submissive

Put the can in the trash.
Unlocked 29 Sep, 2014 @ 1:12pm

Malcontent

Escape the apartment block raid.
Unlocked 29 Sep, 2014 @ 1:44pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 30 Nov, 2024 @ 1:52pm

Trusty Hardware

Get the crowbar.
Unlocked 29 Sep, 2014 @ 1:55pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 13 Feb, 2016 @ 10:11am

Anchor's Aweigh!

Get the airboat.
Unlocked 26 Feb, 2016 @ 2:56pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 30 Nov, 2024 @ 4:54pm

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 21 Jun, 2016 @ 12:07pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 21 Jun, 2016 @ 12:05pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 30 Nov, 2024 @ 5:24pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 30 Nov, 2024 @ 5:22pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 30 Nov, 2024 @ 5:27pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 1 Dec, 2024 @ 5:25am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 1 Dec, 2024 @ 5:18am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 1 Dec, 2024 @ 6:08am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 1 Dec, 2024 @ 6:22am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 1 Dec, 2024 @ 6:01am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 1 Dec, 2024 @ 8:44am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 1 Dec, 2024 @ 7:28am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 1 Dec, 2024 @ 9:28am

Flushed

Kill an enemy with a toilet.
Unlocked 1 Dec, 2024 @ 9:29am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 1 Dec, 2024 @ 10:35am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 1 Dec, 2024 @ 11:52am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 1 Dec, 2024 @ 12:16pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 1 Dec, 2024 @ 1:08pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 1 Dec, 2024 @ 1:45pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 1 Dec, 2024 @ 2:08pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 1 Dec, 2024 @ 3:04pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 1 Dec, 2024 @ 3:23pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 3 Dec, 2024 @ 8:51am

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked 1 Dec, 2024 @ 2:47pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 1 Dec, 2024 @ 9:34am

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 8 Dec, 2024 @ 10:18am

Containment

Contain the Citadel core.
Unlocked 8 Dec, 2024 @ 11:29am

Pacifist

Contain the Citadel core without killing any stalkers.
Unlocked 8 Dec, 2024 @ 11:29am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 10 Dec, 2024 @ 10:50am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 10 Dec, 2024 @ 11:05am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 10 Dec, 2024 @ 11:25am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 10 Dec, 2024 @ 3:07pm

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 10 Dec, 2024 @ 3:34pm

Escape From City 17

Escape City 17 with Alyx.
Unlocked 10 Dec, 2024 @ 3:43pm

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Unlocked 10 Dec, 2024 @ 3:43pm

Conservationist

Kill five enemies with the same energy ball.
Unlocked 8 Dec, 2024 @ 10:32am

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 8 Dec, 2024 @ 10:19am

Zombie-que

Use flares to light 15 zombies on fire.
Unlocked 10 Dec, 2024 @ 11:04am

Acid Reflex

Kill an acid antlion worker.
Unlocked 22 Dec, 2024 @ 5:09am

Get Some Grub

Squish every antlion grub in Episode Two.
Unlocked 22 Dec, 2024 @ 9:48am

Piñata Party

Find and break every web cache in Episode Two.
Unlocked 22 Dec, 2024 @ 8:46am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 22 Dec, 2024 @ 5:42am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 22 Dec, 2024 @ 9:59am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 28 Dec, 2024 @ 4:08pm

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 22 Dec, 2024 @ 10:46am

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.
Unlocked 28 Dec, 2024 @ 3:40pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 28 Dec, 2024 @ 3:57pm

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 28 Dec, 2024 @ 4:34pm

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 28 Dec, 2024 @ 4:42pm

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 28 Dec, 2024 @ 4:06pm

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 28 Dec, 2024 @ 4:29pm

Little Rocket Man

Send the garden gnome into space.
Unlocked 28 Dec, 2024 @ 4:54pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 28 Dec, 2024 @ 5:03pm

Neighborhood Watch

Save all buildings outside the missile silo from destruction.
Unlocked 28 Dec, 2024 @ 6:05pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 28 Dec, 2024 @ 6:05pm

Payback

Kill a Hunter with its own flechettes.
Unlocked 22 Dec, 2024 @ 10:46am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 22 Dec, 2024 @ 7:24am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 22 Dec, 2024 @ 5:29am

Hot Potat0wned

Kill a Combine soldier with his own grenade.
Unlocked 22 Dec, 2024 @ 11:02am

Grave Robber

Steal a Zombine's grenade.
Unlocked 12 Dec, 2024 @ 10:21am

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 10 Dec, 2024 @ 3:47pm