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

Defiant

Hit the trashcan cop with the can.
Unlocked Nov 26, 2017 @ 9:29pm

Submissive

Put the can in the trash.
Unlocked Dec 3, 2018 @ 8:44pm

Malcontent

Escape the apartment block raid.
Unlocked Nov 26, 2017 @ 9:34pm

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked Aug 21, 2018 @ 11:13am

Trusty Hardware

Get the crowbar.
Unlocked Nov 26, 2017 @ 9:45pm

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked Nov 28, 2017 @ 5:32am

Anchor's Aweigh!

Get the airboat.
Unlocked Aug 21, 2018 @ 11:53am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked Dec 9, 2017 @ 2:51am

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked Jul 7, 2020 @ 11:30am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked Dec 9, 2017 @ 2:59am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked Sep 23, 2018 @ 1:57am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked Sep 23, 2018 @ 1:57am

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked Jul 7, 2020 @ 11:30am

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked Jul 7, 2020 @ 11:30am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked Sep 23, 2018 @ 4:12am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked Sep 23, 2018 @ 4:41am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked Sep 23, 2018 @ 5:03am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked Sep 23, 2018 @ 4:35am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked Oct 1, 2018 @ 8:32am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked Jul 7, 2020 @ 11:30am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked Oct 1, 2018 @ 8:31am

Flushed

Kill an enemy with a toilet.
Unlocked Jul 7, 2020 @ 11:30am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked Apr 30, 2018 @ 9:13pm

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked May 1, 2018 @ 4:10am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked Jun 3, 2018 @ 10:10pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked Oct 4, 2018 @ 7:40pm

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked Jul 7, 2020 @ 11:30am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked Jun 18, 2018 @ 11:34pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked Jun 18, 2018 @ 11:56pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked Jun 19, 2018 @ 12:09am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked Jun 19, 2018 @ 12:34am

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked Jul 7, 2020 @ 11:30am

Hack Attack!

Kill five enemies with a Manhack.
Unlocked Jul 7, 2020 @ 11:30am