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

Defiant

Hit the trashcan cop with the can.
Unlocked Apr 10, 2019 @ 3:25pm

Submissive

Put the can in the trash.
Unlocked Jul 25, 2013 @ 1:18pm

Malcontent

Escape the apartment block raid.
Unlocked Jul 25, 2013 @ 1:31pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked Apr 10, 2019 @ 3:59pm

Trusty Hardware

Get the crowbar.
Unlocked Jul 25, 2013 @ 1:42pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked Apr 10, 2019 @ 4:51pm

Anchor's Aweigh!

Get the airboat.
Unlocked Apr 10, 2019 @ 5:30pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked Apr 10, 2019 @ 6:30pm

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked Apr 10, 2019 @ 6:57pm

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked Apr 10, 2019 @ 6:52pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked Apr 10, 2019 @ 9:01pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked Apr 10, 2019 @ 7:28pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked Apr 10, 2019 @ 7:33pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked Apr 11, 2019 @ 7:29pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked Jul 26, 2013 @ 6:24pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked Mar 6, 2015 @ 6:15pm

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked Mar 6, 2015 @ 6:38pm

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked Mar 6, 2015 @ 6:08pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked Apr 12, 2019 @ 6:12pm

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked Apr 12, 2019 @ 4:52pm

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked Apr 12, 2019 @ 6:02pm

Flushed

Kill an enemy with a toilet.
Unlocked Apr 12, 2019 @ 6:43pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked Apr 12, 2019 @ 8:44pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked Apr 13, 2019 @ 5:39am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked Apr 13, 2019 @ 6:17am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked Apr 13, 2019 @ 10:02am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked Apr 13, 2019 @ 11:43am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked Apr 13, 2019 @ 12:25pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked Apr 13, 2019 @ 5:08pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked Apr 13, 2019 @ 5:32pm

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked Apr 13, 2019 @ 6:11pm

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked Apr 13, 2019 @ 4:44pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked Apr 12, 2019 @ 7:19pm