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57 of 69 (83%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 1 Jan, 2019 @ 2:25am

Submissive

Put the can in the trash.
Unlocked 2 Jan, 2019 @ 5:17am

Malcontent

Escape the apartment block raid.
Unlocked 1 Jan, 2019 @ 2:36am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 29 Jun, 2019 @ 8:28am

Trusty Hardware

Get the crowbar.
Unlocked 1 Jan, 2019 @ 2:48am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 29 Jun, 2019 @ 9:01am

Anchor's Aweigh!

Get the airboat.
Unlocked 1 Jan, 2019 @ 3:35am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 1 Jan, 2019 @ 4:17am

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 18 Nov @ 3:37am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 1 Jan, 2019 @ 4:36am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 4 Jul, 2019 @ 5:48am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 4 Jul, 2019 @ 5:48am

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 19 Aug, 2022 @ 4:57am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 5 Jul, 2019 @ 6:11am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 5 Jul, 2019 @ 6:51am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 19 Aug, 2022 @ 6:48am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 5 Jul, 2019 @ 6:44am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 6 Jul, 2019 @ 4:22am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 29 Nov @ 1:28pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 6 Jul, 2019 @ 4:20am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 6 Jul, 2019 @ 6:02am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 6 Jul, 2019 @ 6:24am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 6 Jul, 2019 @ 6:54am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 2 Jan, 2019 @ 2:19am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 17 Nov @ 2:08pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 2 Jan, 2019 @ 3:34am

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 2 Jan, 2019 @ 4:04am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 18 Nov @ 4:51am

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 17 Nov @ 1:14pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 17 Nov @ 1:36am

Containment

Contain the Citadel core.
Unlocked 18 Nov @ 7:09am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 18 Nov @ 10:15am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 18 Nov @ 9:52am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 17 Nov @ 1:36am

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 17 Nov @ 1:36am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 18 Nov @ 11:23am

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Unlocked 18 Nov @ 11:23am

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 17 Nov @ 1:36am

Acid Reflex

Kill an acid antlion worker.
Unlocked 17 Nov @ 1:37am

Get Some Grub

Squish every antlion grub in Episode Two.
Unlocked 21 Nov @ 11:11am

Piñata Party

Find and break every web cache in Episode Two.
Unlocked 21 Nov @ 8:47am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 17 Nov @ 1:37am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 21 Nov @ 11:11am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 21 Nov @ 12:03pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 17 Nov @ 1:37am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 17 Nov @ 1:37am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 17 Nov @ 1:37am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 17 Nov @ 1:37am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 17 Nov @ 1:37am

Little Rocket Man

Send the garden gnome into space.
Unlocked 21 Nov @ 1:36pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 17 Nov @ 1:37am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 17 Nov @ 1:37am

Payback

Kill a Hunter with its own flechettes.
Unlocked 17 Nov @ 1:37am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 21 Nov @ 12:45pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 17 Nov @ 1:37am

Grave Robber

Steal a Zombine's grenade.
Unlocked 21 Nov @ 2:47am

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 16 Nov @ 12:11pm



Zombie Chopper

Play through Ravenholm using only the Gravity Gun.

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.

Pacifist

Contain the Citadel core without killing any stalkers.

Live Bait

Help Alyx snipe 30 enemies in Episode One.

Conservationist

Kill five enemies with the same energy ball.

Zombie-que

Use flares to light 15 zombies on fire.

Hit and Run

Run over 20 enemies with the car in Episode Two.

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.

Neighborhood Watch

Save all buildings outside the missile silo from destruction.

Hot Potat0wned

Kill a Combine soldier with his own grenade.