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55 of 69 (80%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 20 Apr, 2019 @ 2:34am

Submissive

Put the can in the trash.
Unlocked 14 Sep, 2018 @ 9:10am

Malcontent

Escape the apartment block raid.
Unlocked 14 Sep, 2018 @ 9:37am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 21 Apr, 2019 @ 11:53am

Trusty Hardware

Get the crowbar.
Unlocked 14 Sep, 2018 @ 9:49am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 14 Sep, 2018 @ 12:15pm

Anchor's Aweigh!

Get the airboat.
Unlocked 14 Sep, 2018 @ 1:27pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 14 Sep, 2018 @ 2:19pm

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 30 Mar, 2020 @ 6:28pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 14 Sep, 2018 @ 2:35pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 20 Apr, 2019 @ 9:36am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 14 Sep, 2018 @ 2:57pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 31 Mar, 2020 @ 7:48am

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 30 Mar, 2020 @ 2:41pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 15 Sep, 2018 @ 4:17am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 3 Apr, 2020 @ 9:44am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 21 Apr, 2019 @ 1:31am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 15 Sep, 2018 @ 6:55am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 21 Apr, 2019 @ 9:10am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 31 Mar, 2020 @ 5:15pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 19 Sep, 2018 @ 11:50am

Flushed

Kill an enemy with a toilet.
Unlocked 19 Sep, 2018 @ 12:16pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 19 Sep, 2018 @ 1:37pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 19 Sep, 2018 @ 1:56pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 22 Apr, 2019 @ 9:38am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 20 Sep, 2018 @ 10:16am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 23 Apr, 2019 @ 12:43pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 23 Apr, 2019 @ 1:30pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 25 Apr, 2019 @ 12:31pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 21 Sep, 2018 @ 2:34pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 21 Sep, 2018 @ 3:06pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 22 Apr, 2019 @ 9:26am

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 17 Dec @ 6:46am

Containment

Contain the Citadel core.
Unlocked 17 Dec @ 6:46am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 17 Dec @ 6:46am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 17 Dec @ 6:46am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 17 Dec @ 6:46am

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 17 Dec @ 6:46am

Acid Reflex

Kill an acid antlion worker.
Unlocked 17 Dec @ 6:46am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 17 Dec @ 6:46am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 17 Dec @ 6:46am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 17 Dec @ 6:46am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 17 Dec @ 6:46am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 17 Dec @ 6:46am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 17 Dec @ 6:46am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 17 Dec @ 6:46am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 17 Dec @ 6:46am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 17 Dec @ 6:46am

Little Rocket Man

Send the garden gnome into space.
Unlocked 17 Dec @ 6:46am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 17 Dec @ 6:46am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 17 Dec @ 6:46am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 17 Dec @ 6:46am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 17 Dec @ 6:46am

Grave Robber

Steal a Zombine's grenade.
Unlocked 17 Dec @ 6:46am

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 @ 8:09am



Lambda Locator

Find all lambda caches in Half-Life 2.

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.

Citizen Escort

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

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.

Neighborhood Watch

Save all buildings outside the missile silo from destruction.

Payback

Kill a Hunter with its own flechettes.

Hot Potat0wned

Kill a Combine soldier with his own grenade.