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

Defiant

Hit the trashcan cop with the can.
Unlocked Sep 1, 2023 @ 1:23pm

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked Sep 3, 2023 @ 1:24pm

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked Sep 2, 2023 @ 12:28pm

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked Sep 2, 2023 @ 9:17pm

Singularity Collapse

Destroy the Citadel's reactore core.
Unlocked Sep 3, 2023 @ 2:05pm

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked Sep 3, 2023 @ 12:32pm

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked Sep 2, 2023 @ 12:37pm

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked Sep 3, 2023 @ 1:04pm

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked Sep 3, 2023 @ 12:06pm

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked Sep 3, 2023 @ 11:17am

What cat?

Break the mini-teleporter in Kleiner's Lab.
Unlocked Sep 1, 2023 @ 1:30pm

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked Sep 3, 2023 @ 1:37pm

Malcontent

Escape the apartment block raid.
Unlocked Sep 1, 2023 @ 1:26pm

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked Sep 3, 2023 @ 4:59pm

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked Sep 2, 2023 @ 10:36am

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked Sep 2, 2023 @ 10:24am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked Sep 3, 2023 @ 11:36am

Anchor's Aweigh!

Get the airboat.
Unlocked Sep 1, 2023 @ 6:52pm

Heavy Weapons

Get the airboat's mounted gun.
Unlocked Sep 1, 2023 @ 10:44pm

Trusty Hardware

Get the crowbar.
Unlocked Sep 1, 2023 @ 1:37pm

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked Sep 2, 2023 @ 10:36am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked Sep 3, 2023 @ 12:51pm

Barnacle Bowling

Kill five barnacles with one explosive barrel.
Unlocked Sep 1, 2023 @ 5:33pm

Revenge!

Destroy the Hunter-Chopper.
Unlocked Sep 2, 2023 @ 10:22am

Bug Hunt

Use the Antlions to kill 50 enemies.
Unlocked Sep 2, 2023 @ 9:45pm

OSHA Violation

Kill 3 enemies using the crane.
Unlocked Sep 2, 2023 @ 2:07pm

Flushed

Kill an enemy with a toilet.
Unlocked Sep 2, 2023 @ 9:36pm

Where Cubbage Fears to Tread

Defend Little Odessa from the Gunship attack.
Unlocked Sep 2, 2023 @ 12:54pm

Two Points

Use Dog's ball to make a basket in the scrapyard.
Unlocked Sep 2, 2023 @ 10:44am

Targeted Advertising

Pin a soldier to the billboard in the chapter Highway 17.
Unlocked Sep 2, 2023 @ 2:15pm

Submissive

Put the can in the trash.
Unlocked Sep 1, 2023 @ 1:23pm

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked Sep 2, 2023 @ 9:35pm

Hack Attack!

Kill five enemies with a Manhack.
Unlocked Sep 2, 2023 @ 9:42pm