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

Defiant

Hit the trashcan cop with the can.
Unlocked Mar 17, 2017 @ 10:09am

Submissive

Put the can in the trash.
Unlocked Nov 6, 2018 @ 4:03am

Malcontent

Escape the apartment block raid.
Unlocked Mar 17, 2017 @ 10:16am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked Nov 6, 2018 @ 4:11am

Trusty Hardware

Get the crowbar.
Unlocked Mar 17, 2017 @ 10:28am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked Nov 6, 2018 @ 4:33am

Anchor's Aweigh!

Get the airboat.
Unlocked Mar 17, 2017 @ 11:05am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked Mar 17, 2017 @ 11:45am

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked Apr 4, 2017 @ 6:12am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked Mar 17, 2017 @ 12:06pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked Mar 13, 2019 @ 12:16pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked Mar 17, 2017 @ 11:57pm

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked Mar 13, 2019 @ 12:20pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked Mar 13, 2019 @ 1:08pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked Mar 19, 2017 @ 9:19am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked Jul 2, 2019 @ 9:33am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked Jul 2, 2019 @ 9:51am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked Jul 2, 2019 @ 9:26am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked Jul 3, 2019 @ 11:54pm

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked Jul 3, 2019 @ 1:45am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked Oct 20, 2017 @ 7:12am

Flushed

Kill an enemy with a toilet.
Unlocked Jul 3, 2019 @ 5:42am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked Jun 16, 2018 @ 4:50am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked Jun 16, 2018 @ 8:54am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked Jun 16, 2018 @ 9:18am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked Jun 16, 2018 @ 11:05pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked Aug 31, 2019 @ 4:22am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked Jun 17, 2018 @ 4:25am

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked Jul 2, 2018 @ 12:47am

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked Jul 2, 2018 @ 6:12am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked Jul 2, 2018 @ 6:38am

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked Dec 21, 2021 @ 8:27am

Hack Attack!

Kill five enemies with a Manhack.
Unlocked Aug 30, 2019 @ 7:19am