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52 of 69 (75%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 24 Feb, 2019 @ 5:59am

Submissive

Put the can in the trash.
Unlocked 30 Apr, 2014 @ 2:53pm

Malcontent

Escape the apartment block raid.
Unlocked 30 Apr, 2014 @ 2:59pm

Trusty Hardware

Get the crowbar.
Unlocked 30 Apr, 2014 @ 3:11pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 14 Dec, 2014 @ 12:12pm

Anchor's Aweigh!

Get the airboat.
Unlocked 15 Dec, 2014 @ 4:32pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 15 Dec, 2014 @ 5:12pm

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 22 Nov @ 1:10pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 15 Dec, 2014 @ 5:24pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 25 Jul, 2015 @ 3:44pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 16 Dec, 2014 @ 2:52pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 22 Nov @ 1:27pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 22 Nov @ 2:04pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 22 Nov @ 6:18pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 22 Nov @ 6:07pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 23 Nov @ 6:46am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 10 Sep, 2017 @ 8:25am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 10 Sep, 2017 @ 9:34am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 10 Sep, 2017 @ 9:52am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 10 Sep, 2017 @ 10:40am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 10 Sep, 2017 @ 10:57am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 24 Nov @ 3:52pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 10 Sep, 2017 @ 12:11pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 26 Nov @ 1:06pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 26 Nov @ 3:21pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 29 Nov @ 10:36am

Containment

Contain the Citadel core.
Unlocked 29 Nov @ 11:02am

Pacifist

Contain the Citadel core without killing any stalkers.
Unlocked 29 Nov @ 11:02am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 29 Nov @ 11:31am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 29 Nov @ 11:45am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 29 Nov @ 12:07pm

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 29 Nov @ 12:29pm

Escape From City 17

Escape City 17 with Alyx.
Unlocked 29 Nov @ 12:33pm

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 29 Nov @ 10:30am

Zombie-que

Use flares to light 15 zombies on fire.
Unlocked 29 Nov @ 11:31am

Acid Reflex

Kill an acid antlion worker.
Unlocked 30 Nov @ 6:08am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 30 Nov @ 6:26am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 30 Nov @ 7:08am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 30 Nov @ 11:31am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 30 Nov @ 7:35am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 30 Nov @ 8:36am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 30 Nov @ 8:53am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 30 Nov @ 8:58am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 30 Nov @ 8:40am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 30 Nov @ 8:50am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 30 Nov @ 11:06am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 30 Nov @ 11:40am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 30 Nov @ 7:24am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 30 Nov @ 6:16am

Hot Potat0wned

Kill a Combine soldier with his own grenade.
Unlocked 1 Dec @ 2:20pm

Grave Robber

Steal a Zombine's grenade.
Unlocked 30 Nov @ 7:20am

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 29 Nov @ 12:35pm



What cat?

Break the mini-teleporter in Kleiner's lab.

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.

OSHA Violation

Kill 3 enemies using the crane.

Keep Off the Sand!

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

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.

Hack Attack!

Kill five enemies with a Manhack.

Car Crusher

Use the cars to squash 15 antlions 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.

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.