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59 of 69 (86%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 21 May, 2013 @ 6:55pm

Submissive

Put the can in the trash.
Unlocked 28 May, 2024 @ 4:10am

Malcontent

Escape the apartment block raid.
Unlocked 21 May, 2013 @ 7:01pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 16 Nov, 2024 @ 12:07am

Trusty Hardware

Get the crowbar.
Unlocked 21 May, 2013 @ 7:12pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 21 May, 2013 @ 7:24pm

Anchor's Aweigh!

Get the airboat.
Unlocked 10 Sep, 2016 @ 7:16pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 30 Sep, 2016 @ 8:50pm

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 5 Dec, 2024 @ 4:41pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 30 Sep, 2016 @ 9:01pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 16 Nov, 2024 @ 8:04am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 30 Sep, 2016 @ 9:15pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 16 Nov, 2024 @ 7:59am

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 6 Dec, 2024 @ 10:02pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 30 Sep, 2016 @ 10:36pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 6 Dec, 2024 @ 10:30pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 1 Oct, 2016 @ 2:06pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 1 Oct, 2016 @ 1:41pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 1 Oct, 2016 @ 3:21pm

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 10 Dec, 2024 @ 7:12pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 1 Oct, 2016 @ 3:39pm

Flushed

Kill an enemy with a toilet.
Unlocked 7 Dec, 2024 @ 9:43pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 2 Oct, 2016 @ 3:21am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 2 Oct, 2016 @ 3:38am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 2 Oct, 2016 @ 11:13pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 2 Oct, 2016 @ 11:33pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 8 Dec, 2024 @ 4:04am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 9 Oct, 2016 @ 5:51pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 12 Oct, 2016 @ 1:38pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 9 Dec, 2024 @ 1:36am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 12 Oct, 2016 @ 2:22pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 7 Dec, 2024 @ 11:56pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 9 Dec, 2024 @ 3:42am

Containment

Contain the Citadel core.
Unlocked 9 Dec, 2024 @ 3:59am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 9 Dec, 2024 @ 9:28pm

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 9 Dec, 2024 @ 9:40pm

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 9 Dec, 2024 @ 9:57pm

Attica!

Destroy the gunship in the hospital attic.
Unlocked 10 Dec, 2024 @ 2:06am

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 10 Dec, 2024 @ 2:54am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 10 Dec, 2024 @ 3:01am

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Unlocked 10 Dec, 2024 @ 3:01am

Conservationist

Kill five enemies with the same energy ball.
Unlocked 10 Dec, 2024 @ 7:28pm

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 10 Dec, 2024 @ 7:20pm

Acid Reflex

Kill an acid antlion worker.
Unlocked 10 Dec, 2024 @ 3:33am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 11 Dec, 2024 @ 4:55am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 11 Dec, 2024 @ 8:13pm

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 12 Dec, 2024 @ 5:32pm

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 12 Dec, 2024 @ 3:43pm

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.
Unlocked 12 Dec, 2024 @ 4:03pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 12 Dec, 2024 @ 5:32pm

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 12 Dec, 2024 @ 6:08pm

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 12 Dec, 2024 @ 6:13pm

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 12 Dec, 2024 @ 5:45pm

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 12 Dec, 2024 @ 6:02pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 12 Dec, 2024 @ 6:33pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 12 Dec, 2024 @ 8:29pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 11 Dec, 2024 @ 4:45am

Grave Robber

Steal a Zombine's grenade.
Unlocked 11 Dec, 2024 @ 5:11pm

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 10 Dec, 2024 @ 3:05am



Lambda Locator

Find all lambda caches in Half-Life 2.

Pacifist

Contain the Citadel core without killing any stalkers.

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.

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.