Unlocked: Oct 22, 2011 9:46pm
Submissive
Put the can in the trash.
Unlocked: Oct 22, 2011 9:56pm
Malcontent
Escape the apartment block raid.
Unlocked: Oct 22, 2011 10:10pm
Trusty Hardware
Get the crowbar.
Unlocked: Oct 22, 2011 10:35pm
Barnacle Bowling
Kill five barnacles with one barrel.
Unlocked: Oct 23, 2011 1:40am
Anchor's Aweigh!
Get the airboat.
Unlocked: Oct 23, 2011 2:25am
Heavy Weapons
Get the airboat's mounted gun.
Unlocked: Oct 24, 2011 3:30am
Revenge!
Destroy the hunter-chopper in Half-Life 2.
Unlocked: Oct 24, 2011 3:46am
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked: Oct 24, 2011 3:47am
Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
Unlocked: Dec 26, 2011 9:43pm
Hallowed Ground
Escort Gregori safely through the church cemetery.
Unlocked: Dec 27, 2011 6:58pm
OSHA Violation
Kill 3 enemies using the crane.
Unlocked: Dec 26, 2011 10:22pm
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack.
Unlocked: May 5, 2012 11:50pm
Bug Hunt
Use the antlions to kill 50 enemies.
What cat?
Break the mini-teleporter in Kleiner's lab.
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.
One Man Army
Destroy six gunships in Half-Life 2.
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
Flushed
Kill an enemy with a toilet.
Warden Freeman
Survive the second turret standoff in Nova Prospekt.
Follow Freeman
Gain command of a squad of rebels in the uprising.
Radiation Levels Detected
Get through the toxic tunnel under City 17 in Half-Life 2.
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
Counter-Sniper
Kill all of the snipers in City 17.
Fight the Power
Shut down the supression device by disabling its generators.
Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
Lambda Locator
Find all lambda caches in Half-Life 2.
Hack Attack!
Kill five enemies with a Manhack.
