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49 of 69 (71%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 24 Jul, 2014 @ 4:58pm

Submissive

Put the can in the trash.
Unlocked 2 Jan, 2016 @ 2:15pm

Malcontent

Escape the apartment block raid.
Unlocked 24 Jul, 2014 @ 5:11pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 30 Jun, 2017 @ 11:13am

Trusty Hardware

Get the crowbar.
Unlocked 5 Aug, 2014 @ 3:12pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 5 Aug, 2014 @ 3:29pm

Anchor's Aweigh!

Get the airboat.
Unlocked 30 Dec, 2015 @ 5:44pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 30 Dec, 2015 @ 6:33pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 30 Dec, 2015 @ 6:46pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 26 Jun, 2017 @ 1:03pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 31 Dec, 2015 @ 12:27pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 21 Nov @ 10:49am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 31 Dec, 2015 @ 1:29pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 17 Oct, 2016 @ 4:14pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 31 Dec, 2015 @ 3:06pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 31 Dec, 2015 @ 2:45pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 2 Apr, 2016 @ 3:57pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 2 Apr, 2016 @ 3:50pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 18 Apr, 2016 @ 4:05pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 18 Apr, 2016 @ 4:22pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 18 Apr, 2016 @ 4:58pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 19 Apr, 2016 @ 2:02pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 22 Nov @ 8:30am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 19 Apr, 2016 @ 3:02pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 19 Apr, 2016 @ 3:48pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 19 Apr, 2016 @ 4:08pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 20 Apr, 2016 @ 1:42pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 22 Nov @ 1:47pm

Containment

Contain the Citadel core.
Unlocked 22 Nov @ 1:58pm

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 22 Nov @ 2:50pm

Attica!

Destroy the gunship in the hospital attic.
Unlocked 22 Nov @ 3:16pm

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 23 Nov @ 11:09am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 23 Nov @ 11:25am

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 22 Nov @ 1:48pm

Acid Reflex

Kill an acid antlion worker.
Unlocked 23 Nov @ 12:19pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 23 Nov @ 12:46pm

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 23 Nov @ 2:28pm

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 23 Nov @ 6:17pm

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 23 Nov @ 3:30pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 23 Nov @ 4:12pm

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 23 Nov @ 4:44pm

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 23 Nov @ 4:50pm

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 23 Nov @ 4:20pm

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 23 Nov @ 4:38pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 23 Nov @ 6:06pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 23 Nov @ 6:44pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 23 Nov @ 12:41pm

Grave Robber

Steal a Zombine's grenade.
Unlocked 23 Nov @ 2:01pm

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 23 Nov @ 11:26am



Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.

Keep Off the Sand!

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

Flushed

Kill an enemy with a toilet.

Lambda Locator

Find all lambda caches in Half-Life 2.

Hack Attack!

Kill five enemies with a Manhack.

Pacifist

Contain the Citadel core without killing any stalkers.

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.

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.

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.

Hot Potat0wned

Kill a Combine soldier with his own grenade.