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

Defiant

Hit the trashcan cop with the can.
Unlocked 20 Feb, 2013 @ 5:56am

Submissive

Put the can in the trash.
Unlocked 4 Sep, 2012 @ 8:55am

Malcontent

Escape the apartment block raid.
Unlocked 4 Sep, 2012 @ 9:30am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 7 Feb, 2022 @ 7:45am

Trusty Hardware

Get the crowbar.
Unlocked 4 Sep, 2012 @ 9:43am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 4 Sep, 2012 @ 10:09am

Anchor's Aweigh!

Get the airboat.
Unlocked 5 Sep, 2012 @ 6:47am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 5 Sep, 2012 @ 7:33am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 5 Sep, 2012 @ 7:47am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 5 Sep, 2012 @ 8:06am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 5 Sep, 2012 @ 8:07am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 9 Sep, 2012 @ 4:58am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 10 Sep, 2012 @ 11:37am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 4 Nov, 2013 @ 11:50am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 10 Sep, 2012 @ 11:30am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 26 Sep, 2012 @ 8:54am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 12 Sep, 2012 @ 11:51am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 16 Sep, 2012 @ 7:58am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 16 Sep, 2012 @ 8:19am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 16 Sep, 2012 @ 8:49am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 16 Sep, 2012 @ 9:12am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 26 Sep, 2012 @ 8:47am

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 30 Sep, 2012 @ 5:37am

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 30 Sep, 2012 @ 6:03am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 30 Sep, 2012 @ 6:26am

Acid Reflex

Kill an acid antlion worker.
Unlocked 18 Nov @ 12:33pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 29 Nov @ 10:25am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 29 Nov @ 11:05am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 29 Nov @ 11:45am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 29 Nov @ 12:10pm

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 29 Nov @ 12:52pm

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 29 Nov @ 12:14pm

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 29 Nov @ 12:43pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 29 Nov @ 1:14pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 29 Nov @ 10:14am

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 18 Nov @ 12:12pm



Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.

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.

Counter-Sniper

Kill all of the snipers in City 17.

Lambda Locator

Find all lambda caches in Half-Life 2.

Hack Attack!

Kill five enemies with a Manhack.

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.

Containment

Contain the Citadel core.

Pacifist

Contain the Citadel core without killing any stalkers.

Car Crusher

Use the cars to squash 15 antlions in Episode One.

Elevator Action

Survive long enough to get on the parking garage elevator.

Live Bait

Help Alyx snipe 30 enemies in Episode One.

Attica!

Destroy the gunship in the hospital attic.

Citizen Escort

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

Escape From City 17

Escape City 17 with Alyx.

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.

Think Fast!

Kill an Elite Soldier with his own 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.

Little Rocket Man

Send the garden gnome into space.

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.

Grave Robber

Steal a Zombine's grenade.