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| Achievement | Unlocked | Visibility | Global Unlocks | |
|---|---|---|---|---|
|
Giant Killer
Survive the rooftop strider battle in the ruins of City 17. |
27.8% | |||
|
Hallowed Ground
Escort Gregori safely through the church cemetery. |
39.7% | |||
|
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand. |
5.8% | |||
|
Singularity Collapse
Destroy the Citadel's reactor core. |
27.2% | |||
|
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One. |
30.4% | |||
|
Zombie Chopper
Play through Ravenholm using only the Gravity Gun. |
7.0% | |||
|
Fight the Power
Shut down the supression device by disabling its generators. |
28.9% | |||
|
Radiation Levels Detected
Get through the toxic tunnel under City 17 in Half-Life 2. |
31.0% | |||
|
Warden Freeman
Survive the second turret standoff in Nova Prospekt. |
31.8% | |||
|
What cat?
Break the mini-teleporter in Kleiner's lab. |
12.7% | |||
|
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field. |
13.2% | |||
|
Malcontent
Escape the apartment block raid. |
69.6% | |||
|
Lambda Locator
Find all lambda caches in Half-Life 2. |
4.0% | |||
|
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard. |
22.9% | |||
|
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard. |
9.7% | |||
|
Follow Freeman
Gain command of a squad of rebels in the uprising. |
31.8% | |||
|
Anchor's Aweigh!
Get the airboat. |
53.2% | |||
|
Heavy Weapons
Get the airboat's mounted gun. |
47.2% | |||
|
Trusty Hardware
Get the crowbar. |
67.0% | |||
|
Zero-Point Energy
Get the Gravity Gun in Black Mesa East. |
44.2% | |||
|
Defiant
Hit the trashcan cop with the can. |
32.5% | |||
|
Counter-Sniper
Kill all of the snipers in City 17. |
11.2% | |||
|
Barnacle Bowling
Kill five barnacles with one barrel. |
36.9% | |||
|
Revenge!
Destroy the hunter-chopper in Half-Life 2. |
45.0% | |||
|
Bug Hunt
Use the antlions to kill 50 enemies. |
32.7% | |||
|
OSHA Violation
Kill 3 enemies using the crane. |
22.7% | |||
|
Flushed
Kill an enemy with a toilet. |
7.3% | |||
|
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack. |
38.3% | |||
|
One Man Army
Destroy six gunships in Half-Life 2. |
28.9% | |||
|
Two Points
Use DOG's ball to make a basket in Eli's scrapyard. |
9.7% | |||
|
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17. |
17.5% | |||
|
Submissive
Put the can in the trash. |
44.7% | |||
|
Hack Attack!
Kill five enemies with a Manhack. |
7.2% |