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41 of 69 (59%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 4 Nov, 2016 @ 11:35pm

Submissive

Put the can in the trash.
Unlocked 12 Jul, 2019 @ 10:20pm

Malcontent

Escape the apartment block raid.
Unlocked 4 Nov, 2016 @ 11:40pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 12 Jul, 2019 @ 10:53pm

Trusty Hardware

Get the crowbar.
Unlocked 4 Nov, 2016 @ 11:51pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 5 Nov, 2016 @ 12:06am

Anchor's Aweigh!

Get the airboat.
Unlocked 5 Nov, 2016 @ 12:34am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 14 Nov, 2016 @ 1:27pm

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 14 Nov, 2016 @ 3:26pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 14 Nov, 2016 @ 1:45pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 12 Jul, 2019 @ 10:34pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 14 Nov, 2016 @ 3:39pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 12 Jul, 2019 @ 10:46pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 14 Nov, 2016 @ 4:29pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 14 Nov, 2016 @ 4:26pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 15 Nov, 2016 @ 9:08pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 12 Jul, 2019 @ 11:23pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 15 Nov, 2016 @ 5:57pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 18 Nov, 2016 @ 4:03pm

Flushed

Kill an enemy with a toilet.
Unlocked 12 Jul, 2019 @ 10:24pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 17 Nov, 2016 @ 8:10pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 17 Nov, 2016 @ 8:54pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 17 Nov, 2016 @ 9:10pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 17 Nov, 2016 @ 9:23pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 18 Nov, 2016 @ 4:00pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 18 Nov, 2016 @ 4:20pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 18 Nov, 2016 @ 4:59pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 16 Nov, 2024 @ 4:36pm

Containment

Contain the Citadel core.
Unlocked 16 Nov, 2024 @ 4:36pm

Pacifist

Contain the Citadel core without killing any stalkers.
Unlocked 16 Nov, 2024 @ 4:36pm

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 16 Nov, 2024 @ 4:36pm

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 16 Nov, 2024 @ 4:36pm

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 16 Nov, 2024 @ 4:36pm

Attica!

Destroy the gunship in the hospital attic.
Unlocked 16 Nov, 2024 @ 4:36pm

Escape From City 17

Escape City 17 with Alyx.
Unlocked 16 Nov, 2024 @ 4:36pm

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Unlocked 16 Nov, 2024 @ 4:36pm

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 16 Nov, 2024 @ 4:36pm

Acid Reflex

Kill an acid antlion worker.
Unlocked 22 Nov, 2024 @ 8:40pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 22 Nov, 2024 @ 8:57pm

Grave Robber

Steal a Zombine's grenade.
Unlocked 22 Nov, 2024 @ 9:04pm

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 22 Nov, 2024 @ 12:07am



Keep Off the Sand!

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

Bug Hunt

Use the antlions to kill 50 enemies.

Counter-Sniper

Kill all of the snipers in City 17.

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.

Lambda Locator

Find all lambda caches in Half-Life 2.

Hack Attack!

Kill five enemies with a Manhack.

Citizen Escort

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

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.

Twofer

Defeat both antlion guards outside the White Forest.

Hit and Run

Run over 20 enemies with the car in Episode Two.

Meet the Hunters

Survive the Hunter ambush with Alyx.

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.

Gunishment!

Destroy the Combine Autogun in the junkyard.

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.

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.

Little Rocket Man

Send the garden gnome into space.

Secondary Silo Secured

Secure the launch doors on missile silo 2.

Neighborhood Watch

Save all buildings outside the missile silo from destruction.

Defense of the Armament

Save the missile silo from the Combine offensive.

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.