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48 of 69 (70%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 25 Dec, 2020 @ 9:09am

Submissive

Put the can in the trash.
Unlocked 25 Dec, 2020 @ 9:11am

Malcontent

Escape the apartment block raid.
Unlocked 25 Dec, 2020 @ 9:15am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 25 Mar, 2020 @ 7:44pm

Trusty Hardware

Get the crowbar.
Unlocked 25 Dec, 2020 @ 8:57pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 25 Dec, 2020 @ 9:10pm

Anchor's Aweigh!

Get the airboat.
Unlocked 25 Dec, 2020 @ 9:40pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 26 Dec, 2020 @ 8:44am

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 27 Dec, 2020 @ 7:23am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 20 Feb, 2020 @ 8:55am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 26 Mar, 2020 @ 2:47pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 20 Feb, 2020 @ 9:20am

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 27 Dec, 2020 @ 7:50pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 27 Dec, 2020 @ 8:40pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 20 Feb, 2020 @ 10:31am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 28 Dec, 2020 @ 10:05am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 26 Dec, 2020 @ 9:00am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 20 Feb, 2020 @ 11:15am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 16 Mar, 2020 @ 1:10pm

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 29 Dec, 2020 @ 2:32pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 8 Mar, 2020 @ 9:47am

Flushed

Kill an enemy with a toilet.
Unlocked 30 Dec, 2020 @ 8:23am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 8 Mar, 2020 @ 10:43am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 8 Mar, 2020 @ 11:01am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 8 Mar, 2020 @ 11:24am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 30 Dec, 2020 @ 8:18am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 16 Mar, 2020 @ 1:05pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 19 Mar, 2020 @ 2:27pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 19 Mar, 2020 @ 3:05pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 19 Mar, 2020 @ 5:24pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 29 Dec, 2020 @ 8:49pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 15 Nov @ 4:18pm

Containment

Contain the Citadel core.
Unlocked 15 Nov @ 4:18pm

Pacifist

Contain the Citadel core without killing any stalkers.
Unlocked 15 Nov @ 4:18pm

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 15 Nov @ 4:18pm

Attica!

Destroy the gunship in the hospital attic.
Unlocked 15 Nov @ 4:18pm

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 15 Nov @ 4:18pm

Escape From City 17

Escape City 17 with Alyx.
Unlocked 15 Nov @ 4:18pm

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 15 Nov @ 4:18pm

Acid Reflex

Kill an acid antlion worker.
Unlocked 15 Nov @ 4:18pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 15 Nov @ 4:18pm

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 15 Nov @ 4:18pm

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 15 Nov @ 4:57pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 25 Nov @ 10:28pm

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 25 Nov @ 10:45pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 15 Nov @ 4:18pm

Grave Robber

Steal a Zombine's grenade.
Unlocked 25 Nov @ 10:09pm

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 @ 4:18pm



Counter-Sniper

Kill all of the snipers in City 17.

Lambda Locator

Find all lambda caches in Half-Life 2.

Car Crusher

Use the cars to squash 15 antlions in Episode One.

Live Bait

Help Alyx snipe 30 enemies in Episode One.

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.

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.

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.

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.

Hot Potat0wned

Kill a Combine soldier with his own grenade.