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

Defiant

Hit the trashcan cop with the can.
Unlocked 4 Oct, 2015 @ 10:07am

Submissive

Put the can in the trash.
Unlocked 15 Sep, 2019 @ 7:15am

Malcontent

Escape the apartment block raid.
Unlocked 4 Oct, 2015 @ 10:38am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 30 Jan, 2019 @ 7:26am

Trusty Hardware

Get the crowbar.
Unlocked 4 Oct, 2015 @ 10:48am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 4 Oct, 2015 @ 11:29am

Anchor's Aweigh!

Get the airboat.
Unlocked 4 Oct, 2015 @ 12:01pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 4 Oct, 2015 @ 12:41pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 5 Oct, 2015 @ 4:15pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 15 Sep, 2019 @ 6:43am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 5 Oct, 2015 @ 4:34pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 15 Sep, 2019 @ 7:07am

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 15 Feb, 2019 @ 3:39pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 7 Oct, 2015 @ 1:01pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 7 Oct, 2015 @ 1:37pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 4 Feb, 2021 @ 12:11pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 7 Oct, 2015 @ 1:31pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 10 Oct, 2015 @ 6:38am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 7 Dec, 2020 @ 12:37am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 10 Oct, 2015 @ 6:34am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 10 Oct, 2015 @ 7:46am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 10 Oct, 2015 @ 8:02am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 10 Oct, 2015 @ 8:25am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 10 Oct, 2015 @ 8:49am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 8 Feb, 2021 @ 5:40am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 11 Oct, 2015 @ 3:09pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 11 Oct, 2015 @ 3:51pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 8 Feb, 2021 @ 5:32am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 12 Oct, 2015 @ 5:23am

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 8 Feb, 2021 @ 8:17am

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 15 Nov @ 2:52pm

Containment

Contain the Citadel core.
Unlocked 15 Nov @ 2:52pm

Pacifist

Contain the Citadel core without killing any stalkers.
Unlocked 15 Nov @ 2:52pm

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 15 Nov @ 2:52pm

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 15 Nov @ 2:52pm

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 15 Nov @ 2:52pm

Attica!

Destroy the gunship in the hospital attic.
Unlocked 15 Nov @ 2:52pm

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 15 Nov @ 2:52pm

Escape From City 17

Escape City 17 with Alyx.
Unlocked 15 Nov @ 2:52pm

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 15 Nov @ 2:52pm

Acid Reflex

Kill an acid antlion worker.
Unlocked 15 Nov @ 2:52pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 15 Nov @ 2:52pm

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 15 Nov @ 2:52pm

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 15 Nov @ 2:52pm

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 15 Nov @ 2:52pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 15 Nov @ 2:52pm

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 15 Nov @ 2:52pm

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 15 Nov @ 2:52pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 15 Nov @ 2:52pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 15 Nov @ 2:52pm

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 15 Nov @ 2:52pm



Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Flushed

Kill an enemy with a toilet.

Lambda Locator

Find all lambda caches in Half-Life 2.

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.

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.

Cache Checker

Find every radar cache in chapter Under The Radar.

Pedal to the Metal

Beat DOG in a race to the White Forest base.

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.

Bone Breaker

Kill 30 enemies with thrown physics objects.

Deadly Harvest

Kill an enemy by planting a hopper mine.

Hot Potat0wned

Kill a Combine soldier with his own grenade.

Grave Robber

Steal a Zombine's grenade.