Unlocked: Feb 26, 2012 11:16am
Defiant
Hit the trashcan cop with the can.
Unlocked: Feb 26, 2012 11:28am
Malcontent
Escape the apartment block raid.
Unlocked: Apr 10, 2012 2:26pm
Anchor's Aweigh!
Get the airboat.
Unlocked: Apr 22, 2012 8:57am
Heavy Weapons
Get the airboat's mounted gun.
Unlocked: Apr 22, 2012 9:34am
Revenge!
Destroy the hunter-chopper in Half-Life 2.
Unlocked: Apr 26, 2012 10:23am
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked: Apr 26, 2012 10:24am
Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
Unlocked: Apr 30, 2012 6:14pm
Hallowed Ground
Escort Gregori safely through the church cemetery.
Unlocked: May 3, 2012 11:39am
OSHA Violation
Kill 3 enemies using the crane.
Unlocked: May 3, 2012 11:28am
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack.
Unlocked: May 23, 2012 3:09pm
One Man Army
Destroy six gunships in Half-Life 2.
Unlocked: May 13, 2012 2:33pm
Bug Hunt
Use the antlions to kill 50 enemies.
Unlocked: May 17, 2012 11:44am
Warden Freeman
Survive the second turret standoff in Nova Prospekt.
Unlocked: May 17, 2012 12:07pm
Follow Freeman
Gain command of a squad of rebels in the uprising.
Unlocked: May 22, 2012 3:31pm
Radiation Levels Detected
Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked: May 22, 2012 4:02pm
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked: May 23, 2012 2:53pm
Fight the Power
Shut down the supression device by disabling its generators.
Unlocked: May 23, 2012 3:56pm
Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
Unlocked: May 24, 2012 7:40pm
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked: May 29, 2012 5:24pm
Singularity Collapse
Destroy the Citadel's reactor core.
What cat?
Break the mini-teleporter in Kleiner's lab.
Trusty Hardware
Get the crowbar.
Barnacle Bowling
Kill five barnacles with one barrel.
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Two Points
Use DOG's ball to make a basket in Eli's scrapyard.
Zombie Chopper
Play through Ravenholm using only the Gravity Gun.
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17.
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
Flushed
Kill an enemy with a toilet.
Counter-Sniper
Kill all of the snipers in City 17.
Lambda Locator
Find all lambda caches in Half-Life 2.
Hack Attack!
Kill five enemies with a Manhack.
