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33 of 33 (100%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 12 Sep, 2023 @ 10:05am

Submissive

Put the can in the trash.
Unlocked 4 Feb, 2012 @ 11:09am

Malcontent

Escape the apartment block raid.
Unlocked 4 Feb, 2012 @ 11:14am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 12 Sep, 2023 @ 10:13am

Trusty Hardware

Get the crowbar.
Unlocked 4 Feb, 2012 @ 11:24am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 4 Feb, 2012 @ 11:35am

Anchor's Aweigh!

Get the airboat.
Unlocked 12 Sep, 2023 @ 11:00am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 12 Sep, 2023 @ 11:36am

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 12 Sep, 2023 @ 11:50am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 12 Sep, 2023 @ 11:46am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 13 Sep, 2023 @ 10:13am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 13 Sep, 2023 @ 10:13am

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 13 Sep, 2023 @ 10:17am

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 13 Sep, 2023 @ 11:14am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 13 Sep, 2023 @ 11:05am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 13 Sep, 2023 @ 12:18pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 13 Sep, 2023 @ 12:31pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 13 Sep, 2023 @ 12:11pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 14 Sep, 2023 @ 6:30am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 14 Sep, 2023 @ 6:06am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 14 Sep, 2023 @ 6:26am

Flushed

Kill an enemy with a toilet.
Unlocked 13 Sep, 2023 @ 10:18am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 14 Sep, 2023 @ 7:33am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 14 Sep, 2023 @ 7:54am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 14 Sep, 2023 @ 9:46am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 14 Sep, 2023 @ 10:06am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 14 Sep, 2023 @ 10:28am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 14 Sep, 2023 @ 10:57am

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 14 Sep, 2023 @ 11:23am

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 14 Sep, 2023 @ 12:25pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 14 Sep, 2023 @ 12:45pm

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked 14 Sep, 2023 @ 11:13am

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 14 Sep, 2023 @ 6:47am