Achievement Unlocked Visibility Global Unlocks
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard. 		2010-05-30 10:39:53 9.7%
Lambda Locator
Find all lambda caches in Half-Life 2. 		2010-05-30 09:53:00 4.0%
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand. 		Unlocked 5.8%
Zombie Chopper
Play through Ravenholm using only the Gravity Gun. 		Unlocked 7.0%
Hack Attack!
Kill five enemies with a Manhack. 		Unlocked 7.2%
Flushed
Kill an enemy with a toilet. 		Unlocked 7.3%
Two Points
Use DOG's ball to make a basket in Eli's scrapyard. 		Unlocked 9.7%
Counter-Sniper
Kill all of the snipers in City 17. 		Unlocked 11.2%
What cat?
Break the mini-teleporter in Kleiner's lab. 		Unlocked 12.7%
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field. 		Unlocked 13.2%
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17. 		Unlocked 17.5%
OSHA Violation
Kill 3 enemies using the crane. 		Unlocked 22.7%
Singularity Collapse
Destroy the Citadel's reactor core. 		Unlocked
27.2%
Giant Killer
Survive the rooftop strider battle in the ruins of City 17. 		Unlocked 27.8%
Fight the Power
Shut down the supression device by disabling its generators. 		Unlocked 28.9%
One Man Army
Destroy six gunships in Half-Life 2. 		Unlocked 28.9%
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One. 		Unlocked 30.4%
Radiation Levels Detected
Get through the toxic tunnel under City 17 in Half-Life 2. 		Unlocked 31.0%
Warden Freeman
Survive the second turret standoff in Nova Prospekt. 		Unlocked 31.8%
Follow Freeman
Gain command of a squad of rebels in the uprising. 		Unlocked 31.8%
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard. 		Unlocked 22.9%
Defiant
Hit the trashcan cop with the can. 		Unlocked
32.5%
Bug Hunt
Use the antlions to kill 50 enemies. 		Unlocked 32.7%
Barnacle Bowling
Kill five barnacles with one barrel. 		Unlocked 36.9%
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack. 		Unlocked
38.3%
Hallowed Ground
Escort Gregori safely through the church cemetery. 		Unlocked
39.7%
Zero-Point Energy
Get the Gravity Gun in Black Mesa East. 		Unlocked 44.2%
Submissive
Put the can in the trash. 		Unlocked
44.7%
Revenge!
Destroy the hunter-chopper in Half-Life 2. 		Unlocked 45.0%
Heavy Weapons
Get the airboat's mounted gun. 		Unlocked 47.2%
Anchor's Aweigh!
Get the airboat. 		Unlocked 53.2%
Trusty Hardware
Get the crowbar. 		Unlocked 67.0%
Malcontent
Escape the apartment block raid. 		Unlocked 69.6%