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44 of 69 (64%) achievements earned:
Personal Achievements
 

Malcontent

Escape the apartment block raid.
Unlocked 17 Nov @ 7:19am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 18 Nov @ 9:20am

Trusty Hardware

Get the crowbar.
Unlocked 17 Nov @ 7:31am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 17 Nov @ 7:42am

Anchor's Aweigh!

Get the airboat.
Unlocked 17 Nov @ 8:04am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 17 Nov @ 8:32am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 17 Nov @ 8:41am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 17 Nov @ 8:54am

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 17 Nov @ 8:57am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 17 Nov @ 9:47am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 17 Nov @ 10:18am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 18 Nov @ 8:01am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 18 Nov @ 7:43am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 18 Nov @ 8:19am

Flushed

Kill an enemy with a toilet.
Unlocked 18 Nov @ 8:09am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 18 Nov @ 9:13am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 18 Nov @ 9:25am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 18 Nov @ 1:17pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 18 Nov @ 1:38pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 18 Nov @ 2:00pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 18 Nov @ 2:16pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 18 Nov @ 2:39pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 18 Nov @ 3:11pm

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 19 Nov @ 3:13am

Containment

Contain the Citadel core.
Unlocked 19 Nov @ 3:22am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 19 Nov @ 4:19am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 19 Nov @ 4:21am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 19 Nov @ 4:45am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 19 Nov @ 5:18am

Acid Reflex

Kill an acid antlion worker.
Unlocked 19 Nov @ 5:59am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 19 Nov @ 6:10am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 19 Nov @ 7:03am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 19 Nov @ 9:00am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 19 Nov @ 7:29am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 19 Nov @ 7:50am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 19 Nov @ 8:09am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 19 Nov @ 8:13am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 19 Nov @ 7:53am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 19 Nov @ 8:04am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 19 Nov @ 8:30am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 19 Nov @ 9:01am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 19 Nov @ 5:59am

Grave Robber

Steal a Zombine's grenade.
Unlocked 19 Nov @ 7:12am

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 19 Nov @ 5:18am



Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.

OSHA Violation

Kill 3 enemies using the crane.

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.

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.

Pacifist

Contain the Citadel core without killing any stalkers.

Car Crusher

Use the cars to squash 15 antlions 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.

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.

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.
+2

2 hidden achievements remaining

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